In hindsight the final line of algebra isn't actually too bad and could be done by hand in a few steps but is just annoying at the end of a long question.
That being said, only the handful know what it takes to solve it under 3 mins. You basically have to kill everything you like except studying to get that kind of practice.
As a JEE aspirant, I have solved many of the JEE Advanced problems but believe me guys they are so painful! But when you get the answer, your confidence is at next level.
I can still remember while I was solving this question in JEE Advanced 2016 sitting inside IIT Kharagpur (my examination centre). I was able to solve it and the internal happiness was on next level. I looked at the ceiling and thanked the God to help me out. I was actually obsessed with getting admission into my dream institute, Indian Institute of Technology! Today I am a physics research scholar at the best institute of India, Indian Institute of Science Bangalore after graduating from IIT Guwahati (the institute who actually made this question). I got goosebumps after suddenly seeing this question while scrolling RUclips. It's been 7 years since my dream started.❤
congratulations sir 🎉 which coaching did you study from? any advice like how to improved in physics like I only watched lecture as one person said me that concept is everything but i didnt focus on question practice I am also an jee aspirant
@@arihantjaiswal7972 Hi, I didn't have any coaching, rather I don't believe that coaching will do anything more than what you can do by yourself. You should focus on the concepts, ask questions to yourself about the subjects and try to get a solution on your own. That's how you get better and better in concepts. JEE advanced is an exam which determines your thinking capabilities and clarity in concepts. You may miss a few practice sessions but never miss a concept to understand. After understanding the concepts, practicing questions will be a cherry on top of the cake. Never take an equation as granted. Find how the equations come or derived and you're ready for your JEE! All the best!
@@santanumandal5906 thanks sir for answering me but i have a question how to develop concept like by watching lecture or by practicing question it's amazing that you don't join any coaching but can you tell me how to build concept to such a level of advanced or bhaiya kya lecture dekhne se kuch faiyda hoga ki practice pe jyada focus karu
@@arihantjaiswal7972 First go through the lectures or read the books. Reading text books are also a great and most accurate way to learn things properly. If you prefer lecture series then make sure those lectures are correct and from a reputed organisation. Never skip any topic in between two important topics. Don't focus only on "important" topics otherwise you'll end up messing up the concepts. After studying from books or any reputed lecture series, you can start practicing the questions... gradually increase the difficulty levels.
Me, a grad student in aerospace engineering: Oh that isn't that hard Tibees: This is a high school exam Me, a grad student in aerospace engineering: ._.
@Drishtant Rai that is not true. Most questions are nowhere near this question difficulty wise. Most questions are conceptual and tricky, but can be done in 3 min.
@@fealdorf fyi the high school doesn't teach any of these techniques in details....most of them cover the bases...so you r wrong in that sense....there is more preference given to theory rather than the practical usage....and don't even get me started on shortcuts...no one gives us shortcut...the shortcuts most of us use r developed by ourselves...by continuous practicing ...
@@icecoldsalvo I'm not aware of an exam tougher than JEE ADV (which the Indians give) and not just in terms of the difficulty but also the selection chances. Could you please enlighten me of any other exam from any other country that's as tough?
@@kamalnath828 its an exam for people trying to get into prestigious universities, he originally thought it wasnt that hard until he found out that it was for minors trying to get into universities
It is essential to note that the concept of double rotation is not in the jee syllabus and the students are usually not taught this. So this also really adds to the difficulty of the question
This would be a regular exam question in Dynamics in an American university and the professor would normally give us 25 minutes to solve this. Godspeed to those taking the JEE.
But that's what sucks! Students solve these using "tricks" rather than concept. Every problem- physics or maths- should be a story, a journey. In JEE, it is reduced to a group of equations. There is no way you can solve this problem with full conception within 3 minutes. That is why Indians are going places as high skilled workers but not as entrepreneurs and innovators.
China Number 1 umm dude that’s litterally Chinese people they worked soo extremely hard just to have an ok well paying Job but the Indians are the ones who are CEOs of the big Fortune 500 companies
@@sushenpenakalapati9966 Only 6 Indians are CEOs of Fortune 500 companies. That's 1.2% of all CEOs in Top 500. Europeans and mostly, Americans are about 70%. Only 3 Indian private enterprises are in Fortune 500 (Ambani, Tata and Rajesh, none of which are IIT graduates). When was the last time someone working in India got Nobel Prize in any science discipline? India's education system is not meant for skill development, innovation or entrepreneurship. It is meant to produce disciplined workers who rarely think out of the box. There is nothing wrong in admitting that Indian education system is outdated and is a remnant of colonial legacy. The world has moved forward, Indian education system didn't.
@@hssy2jrocker America's business friendly environment is the reason for most companies and startups being there. That's not the fault of Indian students. They are incredibly smart, especially compared to Americans and Europeans but lack labs, RnD facility so they move out. If we had even a hundredth of the facility of Americans we would completely rule it, alongside Chinese(communism ruins their potential), Japanese, Korean etc.
@@ajayade6903 no, advanced exam is full of traps, if you get stuck at a question you are at tremendous loss, even if you solve it in 10-15mins during the exam, don't think you won, because you're still at loss.
@@michaeljohnston3038 its covid’s reign of terror, everyday around 400k cases are recorded… but in reality there are about 700k cases each day.. sorry for broken English
@@divyanshsingh6668 oh man that's awful. Has the vaccine rollout been poor there. Probably cause rich countries bought them first. And btw your English is perfect better than some people here in the uk
@@kirtigupta9753 lol kirti gupta i have cleared jee advance but all iitians are not that successful yes paper is hard but once you enter iit does not mean you will be the next ceo of google or microsoft btw microsoft ceo is not from iit
She is not exactly explaining, she using the formulae of both rotatory and translatory motion.. had she actually explained all the steps the video wud have been much longer..
@Gaurav Sharma NOT India, lol. I am not sure how many of those that graduate from IIT stay and work in India. I would guess less than 2%, but that may be on the high end.
I tried this question, 3 times, but failed, on the next attempt, I figured out the fact that angular velocity about point O when the body rotates around the O would be a vector, perpendicular to the L vector drawn from point O. And thats when I finally solved it, and took a 15 mins break after exhausting my entire brain phew.@@143TYAGI
I am preparing for JEE 2021 and while solving PYQs, I was stuck in this question. I couldn't solve this one. RUclips recommended this video after just one day😂😅
Tibees: "Here is the toughest question ever put on JEE Advanced. I took 15 minutes to solve it." Some random Indian kid preparing for JEE Advanced:"i cAn sOLve iT iN jUsT 3 MiNuTesS"
This is a legendary question, i remember my physics teacher in a coaching institute was telling me how it took so many professors working on it before the answer key was published. Behold JeeAdv😎
I screenshot it and attempted it before watching. It honestly took me 30 minutes, but I got A and C. If that's for high school students thats unbelievable. Great video.
I am an engineer that moved from Europe to Asia. The view on university education is very different here. It's all about the entrance exam. The exam is very hard, but students spend enormous amount of time practising similar questions over and over again. The entrance exam is indeed unrealistically difficult. It's how they select people for the good (and cheap) universities. The rest needs to go to more expensive private universities. Frankly, I think the system is a bit absurd, because it spits out many people that could have been good engineers as well and it selects others because they can pay for private tutoring specifically aimed at passing the entrance test.
Lmao what a joke...most of the students will leave this question on the very first site...only a few of them (probably the rankers or top students) would be able to go through the entire question in one go.
The people here bragging about the selection rate being 0.2% should understand that it isn't to be proud of something. Though the people clearing JEE Adv would definitely be among the smartest students out there, the low selection rate basically shows our overpopulation and the lack of enough good-quality institutes for the masses. I am an JEE aspirant too (2023) and seeing 1.1 million people compete for 17k-20k seats shouldn't be the case. Edit: Guys I got into IIT Delhi in first try. So yeah finally over
@@rushwinvaishnav3356 bro I am just saying it to those people who were bragging about the selection rate being too low as if that itself was an achievement. Clear karne me to maja hai hi ofc
@Yath YT Yash the point of my comment was to say that the low selection rate isn't an achievement. Obviously there are a lot of good institutes but there aren't enough. Only a handful of the private ones are good enough and there aren't enough seats for students. This too is the reason why private colleges take a huge amount of "donations" from students in exchange of seats. After perhaps 100k students in JEE Mains, it all comes down to who can pay more.
As someone who has cracked the JEE in the past, it saddens me as to how I had completely forgotten the joy of solving problems like this till I saw this video. Thanks for bringing back some really cool memories.
@@McMaster27 i dont need any outside substances including coffee, tea each to stay contious. If i cant consanteate then i rest then i start solving issues again. It produce less stress and external substances does supress our bodily needs and functions. Later on in life those will strike back really hard.
Nityanand Saswade stop being r/iamverysmart tier. ain’t funny, everyone knows, even geniuses know, that you need to have AT LEAST 10 grams of pure caffiene beforehand.
To those foreigners who generalize India as Bob and vagana seekers...this is another dimension of India and more real version....let that sink in for a while..
@Abitamim Bharmal just 10% of India s population would be 50 times more than your country's population... Between I am sure with the attitude of urs you cannot even manage 2-3 people in your family while talking about India which is pretty much doing better for its ultra mega sized population...
When you have millions of kids every year, whose parents want them to become doctors or engineers, this is the only way to sift through the talent I guess. Brutal nevertheless :/ 3 minutes? Insanity.
@@ayushtejaswi8403 that's why i am focusing on my 11th and 12th grade. after that i will bag some scholarships and move to canada for my dream - Computer science !! ;)
Fascinating what the human mind is capable of. I think I saw / solved a similar problem on a 45 min test, but that was in a university 3'rd year engineering course, not the dang entry exam! I don't think I've ever been able to do that type of problem in 3 min, but schools in America are way more relaxed. It's just interesting to know that some people can do it... crazy.
Its just practise nothing else. All these competitive papers and olympiads can even be solved by middle graders if they Practise practise practise.......till infinity
Well i mean... American high schools don't even teach calculus to most students so we don't even have to go that deep to see its a joke of a comparison
3rd year engineering for University?? This is a complicated rotary motion question over topics taught in US high schools (AP courses). It's could even be one put on the end of the AP exam, it doesn't seem that far out their. Probably unlikely though.
Just to clarify, 3 minutes is the average time per question for the exam(that is, if one were to attempt all the questions). But since a very small percentage of people attempt all the questions, the majority gets aroud 10 to 15 minutes for a question of this difficulty. Most high schoolers giving the JEE are just immature attention seekers, the exam isnt even as hard as they say
It is because of idiots who are forced to take engineering , over 1.6 million kids take for some thousand seats , for obvious reasons it's 0.2 , it's because of the number of people answering the exam.
As a final year engineering student, I swear that the only time you met this kind of mechanical physics problem is just in your first year of study, and then you will just forget it because there's a more realistic problem to solve. The most important thing here is the way you break the problem into several equations that linked altogether, and this way of thinking is what you will use until you graduate and work in engineering profession. Btw, it's a great video to refresh your memory, thanks Toby!
Look sir, you're acting like your from your generation but interacting with our generation. I bet she doesn't feel anything about the trolls. THIS IS THE INTERNET!! NOT REAL LIFE.
In study years ago at Sheffield city polytechnic, this type of problem appeared in exercises. You explain your solution quickly and clearly in less than 20 minutes. The lecturers teaching were very fluent using these principles in industrial design work. We learned in the real world, Strains are measurable and stresses in proposed designs are required. To find design stresses we first need to find forces , velocities and accelerations. Thank you Toby. I am interested in taking this further and a three dimensional exercise using Eulers Formulae for inertia would be of well worth watching. I have a few rough exercises on a computer memo sketch. Perhaps Toby could do a respectable version !
Hi so...I am currently in my 11th grade. I suppose u know the chapters important for the upcoming years, if by any chance you remember it, please do share with me sister🤗
I'm an Indian student. In 2016, I've given JEEadv. exam & have attempted that question. In India, there are a lot of coaching institutes (cram schools) which prepare us mentally & conceptually to attempt such type of questions. Nearly all the students of my batch have attempted that question correctly gaining half or full marks.
@mathsonboard duh, dude I cleared it, I'm going to IIT Delhi ranked 193 globally.. Ain't Nun wrong wit my English but its your IQ that u can't comprehend shortforms
I remember racing against time to solve it within 2 mins, 5 years ago (I had to save time for questions on inorganic chemistry - my weak subject)... I don't remember much formulae so I try to derive it ... Chemistry was a bit challenging for me as i didn't remember many intricate stuff/equations in inorganic chemistry either... otherwise Physics and Maths went like charm, everything was derivable.. Thanks for bringing the memories back!!
Bhai CA karlo IIT,UPSC sab bhul jayenge. Mein khud CA final tak kaise toh bhi pohocha😅 But The Knowledge you have In this Field is uncompeteble compare the 2
As a student in 11th standard in India especially in Kota (please google this place). This was one of the most difficult module for me to understand as a student. Thank you for reminding me how could I have learnt this better. Also i was in class 11th in 2007. So yeah i see everyone as kids now 😂
4:55 Considering velocity vector as slanted is wrong. The reason being, when you curl the fingers when taking omega slanted, the assembly rotates on a slanted plane which is totally not the premise of the question, I advise you to look into this before students make assumptions.
The instantaneous velocity is slanted. As the system rotates, the velocity vector will rotate. She is right. I think you are probably conceptualizing the average velocity over one full rotation.
@@oliverkleinmann8279 I was talking about the second vector she drew. Omega spin is fine, omega orbital that she drew later points upwards and their net resultant lies horizontally along the instantaneous axis of rotation (line joining points of contact of both discs)
@@anmoldeepsingh9281 indeed the L orbital will only point in the slanted direction while capital omega is vertical, somewhat similar to a pendulum situation.
@@graystone2802 actually it's a piece of cake do you think any one with a PHD degree will suffer in thi type of question . It's complex question but not upto that level 😂😂😂
@@AdarshKumar-kd9yg This is definitely a difficult problem, there is no doubt. Also, just because you have a PHD doesn’t automatically mean you will know how to solve this problem lol, physics is a huge branch of knowledge. Having a degree or PHD generally just means you have a general knowledge of the subject, and you know where to reference the specific information in case you need to use it. I passed analytical mechanics with a 95, but still I can’t solve this problem with the information I know right now, but I know for certain I could solve it given enough time and a mechanics textbook to look back on.
I am so impressed with your formula recall. Although I understand everything, I don't think I would recall all the formulas that well, but obviously you had a very good education.
I saw this video when i was in 9th and was completely swept away of the thought that i was going to be bombarded with such questions in the exam i am gonna be appearing in, after 12th and today after 2 years i solved this question (it was in question sheet of my coaching ) and was able to solve it pretty quickly. All thanks to my teachers , specially BKM sir ( bharat kumar motaria) who teaches me physics. I feel so blessed today.☺️
I think the take away message for the last question is that you should always think before working our these kind of tedious calculations. What you should do is realize that 81*24/25 is about 81 and 17/10 is about 2. So it's easily deduced that the answer is much larger than 55 anyway, and that's all you need to answer the question correctly. If it's intended like this then it's a great didactic question. It seperates the dilligent students from the creative students. Because at the end of the day, the creative students will make better physicist, regardless of their grades.
Thank you for explaining this problem very insightfully. I solved that problem in exam but it was only because I had practised such rigorous problems before. But what's painful is that I could never see the beauty in such conceptual problems. I would just solve the problem and be like, "Yes, it's done."
I don't want to stereotype, but judging by these comments, the academic culture of college and high school aged Indian men studying to be engineers and physicists seems incredibly boastful, judgemental, and self-righteous. I think the majority of these comments can be summed up as "And you think x is hard, you should try my y curriculum or under my z time constraints." and then the ensuing flamewar of other Indian men insulting their intelligence for complaining, or bragging about how much harder they have it. This has to be one of the most toxic comment sections I've seen on a science/math video. Y'all need to seriously chill out.
Well said. India doesn't have any Noble Laureates, because its industrialisation of education here not really a passion to learn. Majority of students have no passion nor insight into a subject, just plain mathematics problem solvers, who cannot solve social problems or the real world without someone else who got the vision to use them for work (like Steve Jobs). India needs MIT, Standford, Oxford etc.., not IIT.
Easy way to solve this: Firstly moment of Inertia about it's axis I= (ma^2)/2+ (4m(2a)^2)/2 = (17ma^2)/2 So L = Iw=(17ma^2)w/2 option c is correct 😊 Now let r is radius of circle formed by small disc(you can take big disc also) when this system is rotated about point O 2pi(r) = n*(circumference of small disc) 2pi(r)=n2pi(a) n = r/a and r=√(l2 +a2) Pythagoras theorem Put l = √24a so r = 5a so n=5 w' = w/n = w/5 ( w' is angular speed about z axis) option a is correct 😉 angular momentum along z axis is (L sinx) x is angle b/w it's axis and ground when you calculate sinx you find answers do not match with option d so do b. So d and b eliminated 😎. And correct answer is a,c it took me 2-3 min. I am Indian
When you memorise all the formulas and methods then course you can do it in a few mins lmao, but others would try to think holistically and solve it from scratch. It doesn't make you smart.
I had solved this question but I took me over 7-8 minutes to do it in the exam !!! I had a solution in which I calculated The magnitude of angular momentum across the centre of mass first.
In hindsight the final line of algebra isn't actually too bad and could be done by hand in a few steps but is just annoying at the end of a long question.
I was waiting for this
Nice Explaination ..👍
Tibees do you know how to create a atom bomb.
@@happyman_smiling bro what ?? 😂😂🤣
ruclips.net/video/J12mlh6aveM/видео.html
As an engineering student in Europe Im glad I wasn't born in india. My god
I was 😫
MeToo
What
@@PIYUSHKUMAR-bz5hx what me too?
Im giving jee this year
Non-asians : This is the hardest question
Indian : Ye toh NCERT wala hai.
😂😂😂😂
Bhai ncert ka bhi nhi ha ...ab concept bole tu toh haar chiz ncert se hi hoti ha 😳
'Most hardest' a little grammatical error.
@@dnhdfnfkrjxjxfjjggj3002 i used it to emphasize on the hardness of the problems
@@leechCat ok bro.😅😅
Respect for those indian high school students who solve that
And we solve these in under 2 minutes.
That being said, only the handful know what it takes to solve it under 3 mins. You basically have to kill everything you like except studying to get that kind of practice.
And we are really happy to have someone like her to look over these papers and help solving them. Truly she is like our genius big sister.
Damn right we are.
@@shivammeet if u were so intelligent you won't be commenting on RUclips. I bet you don't even know basic algebra
As a JEE aspirant, I have solved many of the JEE Advanced problems but believe me guys they are so painful!
But when you get the answer, your confidence is at next level.
Hey bro u like Beethoven?
@@ekjyotsinghpanesar1194 I do ma boi
@@prajnadiptakarmakar8542 me too
How was your exam bro?
Best of luck
And then there is a *Sharma ji ka ladka* who scores 355 out of 360
SaRaNsH XD probably used chegg
That was in mains not in advanced
Veerwalji ka beta not sharmaji ka beta(Kalpit veerwal) 360/360 in jee mains 2017.
Nope
So what you want to Convey
The time You were Wasting was utilised by them
*Solves question in 20 minutes*
Jee aspirant: How i am supposed to solve this in 3 min
HEY U get about 8 or 9 min for 1 physics question' in paper 2 advance
you suppose to skip this ,,,
it's not "solves", it's explained you "noob"
@@moviegeek6805 nope it's only 3 min
@@moviegeek6805 nope
Wow.... To whoever solved thos questions in India.... A big respect from 🇦🇺
Yeah
I bet Most guys bragging in cmmnt section are those who could not understand this question even after watching this video
The fact that we have to solve this within one minute or less
@@priyaaa1892 no not one minute. Don't exaggerate it's tough anyways it doesn't need exaggeration to make it look tough.
Thanks bro 👍
I can still remember while I was solving this question in JEE Advanced 2016 sitting inside IIT Kharagpur (my examination centre). I was able to solve it and the internal happiness was on next level. I looked at the ceiling and thanked the God to help me out. I was actually obsessed with getting admission into my dream institute, Indian Institute of Technology! Today I am a physics research scholar at the best institute of India, Indian Institute of Science Bangalore after graduating from IIT Guwahati (the institute who actually made this question).
I got goosebumps after suddenly seeing this question while scrolling RUclips.
It's been 7 years since my dream started.❤
congratulations sir 🎉
which coaching did you study from?
any advice like how to improved in physics like I only watched lecture as one person said me that concept is everything but i didnt focus on question practice I am also an jee aspirant
@@arihantjaiswal7972 Hi,
I didn't have any coaching, rather I don't believe that coaching will do anything more than what you can do by yourself. You should focus on the concepts, ask questions to yourself about the subjects and try to get a solution on your own. That's how you get better and better in concepts. JEE advanced is an exam which determines your thinking capabilities and clarity in concepts. You may miss a few practice sessions but never miss a concept to understand. After understanding the concepts, practicing questions will be a cherry on top of the cake. Never take an equation as granted. Find how the equations come or derived and you're ready for your JEE!
All the best!
@@santanumandal5906 thanks sir for answering me
but i have a question how to develop concept like by watching lecture or by practicing question
it's amazing that you don't join any coaching but can you tell me how to build concept to such a level of advanced
or bhaiya kya lecture dekhne se kuch faiyda hoga ki practice pe jyada focus karu
thanks for replying me as nobody is guiding me i alone is fighting
@@arihantjaiswal7972 First go through the lectures or read the books. Reading text books are also a great and most accurate way to learn things properly. If you prefer lecture series then make sure those lectures are correct and from a reputed organisation. Never skip any topic in between two important topics. Don't focus only on "important" topics otherwise you'll end up messing up the concepts.
After studying from books or any reputed lecture series, you can start practicing the questions... gradually increase the difficulty levels.
Me, a grad student in aerospace engineering: Oh that isn't that hard
Tibees: This is a high school exam
Me, a grad student in aerospace engineering: ._.
It's not a big deal, as we have to train in such a way . So it looks okay.
To be able to give this exam , we need to clear jee mains .
hey I’m also planning to be an aerospace engineer. How is aerospace engineering?
yep...
Is that an inferior units system (freedom units?)
A real brilliant student would’ve left this question in the examination 😂
Nearly all the questions will have this level of difficulty. Going by your logic a brilliant student will not get selected
@@jdeep7 Dude where are you from are you from India??
Sahi bola
@Drishtant Rai that is not true. Most questions are nowhere near this question difficulty wise. Most questions are conceptual and tricky, but can be done in 3 min.
exactly!!!
I won't be able to even understand the question in 3 minutes ...
Same happened with me when I sat for the same paper 😂 in the examination hall
Just skkipe those question and then you realise you just skipped 90% question🤣🤣🤣🤣🤣🤣🤣🤣🤣
@@piyushpathak1186 Bhai unko 10 % pe nahi aayega
😂😂😂
Funny....
It would take me two seconds..
To realize that I need to change my profession.
This is not the hardest part.
The hardest part is when you do JEE mains and advanced and a 4-year course and remain unemployed.
Start teaching lol
ok boomer
@@dakshinmurthy4552 do you even know the meaning of "ok boomer"?
🥺
😂😂😂true story
Think about 17 year old highschool guys who have to solve these difficult questions in less than 3 min for 3 hours continuously ....
well said bro
It's literally torture bro
Its better to study for neet
@@fealdorf fyi the high school doesn't teach any of these techniques in details....most of them cover the bases...so you r wrong in that sense....there is more preference given to theory rather than the practical usage....and don't even get me started on shortcuts...no one gives us shortcut...the shortcuts most of us use r developed by ourselves...by continuous practicing ...
well is that the reason there is girls quota in jee ???
Difficulty level: *Asian*
@@av1479 Singapore, hong kong, south korea etc also have tough exams. Asia in general have high education standards
@@icecoldsalvo yup
Well yes but ...
@@av1479 You clearly have no idea about South Korean, Japan, Singapore, Taiwan then.
@@icecoldsalvo I'm not aware of an exam tougher than JEE ADV (which the Indians give) and not just in terms of the difficulty but also the selection chances.
Could you please enlighten me of any other exam from any other country that's as tough?
I was going to discredit the toughness of this exam until i saw it's a high school level exam...
hahaha
What you mean
It's true. But I didn't find it too hard.
@@kamalnath828 its an exam for people trying to get into prestigious universities, he originally thought it wasnt that hard until he found out that it was for minors trying to get into universities
@@jihad456 what mark did you get on it?
Selection ratios on an average
Ivy league: 1 out of 30
IIT JEE: 1 out of 150
Edit after 4 months: I cleared IIT JEE 2021😀
Bro can i get your insta id or something to contact you i just want to talk to you about it
Hey what's ur rank bro😊👌 BTW congrats
And .ivy leagues are better than IITs
Air?
@@djekoelada9969 All India Rank, if u get that then congratulation cuz u are officially one of the greatest students in the world no cap
Never seen somebody so happy doing a jee ques
It's all fun and games when it's a RUclips video And not a 3 minute rush for your life lmao 💀 only we Indians will know this chutiyagiri
@@manaspuranik8353 What does chutiya mean?
@@hypatia6833 come to India, we'll explain.
😂🤣🤣🤣🤣 true man 👍 very true.
@@Amrit-ly5jo Oh, thanks for telling me that.
*INDIA exams are conducted to reject students not to select*
✔️✔️
Old one..... 😒😒😒
Wow
Baak bsk
@unixmonk Or, the rich. ;( These days you got to have a lot of coin to study at a coaching center for years.
Well you were definitely rejected
These questions are called your rank deciders in JEE exam ..........
not really
@Sai Kartik Hosur true
@Sai Kartik Hosur its still the rank decider, if you skip without wasting your time on it :)
@@ameyjoshi799 yes
@The biggest lie is : that is a way of deciding your rank....
It is essential to note that the concept of double rotation is not in the jee syllabus and the students are usually not taught this. So this also really adds to the difficulty of the question
Instantaneous axis of rotation is taught, and com frame
This would be a regular exam question in Dynamics in an American university and the professor would normally give us 25 minutes to solve this.
Godspeed to those taking the JEE.
True but they are in highschools. Imagine the SAT being this har dlol
But that's what sucks! Students solve these using "tricks" rather than concept. Every problem- physics or maths- should be a story, a journey. In JEE, it is reduced to a group of equations. There is no way you can solve this problem with full conception within 3 minutes. That is why Indians are going places as high skilled workers but not as entrepreneurs and innovators.
China Number 1 umm dude that’s litterally Chinese people they worked soo extremely hard just to have an ok well paying Job but the Indians are the ones who are CEOs of the big Fortune 500 companies
@@sushenpenakalapati9966 Only 6 Indians are CEOs of Fortune 500 companies. That's 1.2% of all CEOs in Top 500. Europeans and mostly, Americans are about 70%. Only 3 Indian private enterprises are in Fortune 500 (Ambani, Tata and Rajesh, none of which are IIT graduates). When was the last time someone working in India got Nobel Prize in any science discipline? India's education system is not meant for skill development, innovation or entrepreneurship. It is meant to produce disciplined workers who rarely think out of the box. There is nothing wrong in admitting that Indian education system is outdated and is a remnant of colonial legacy. The world has moved forward, Indian education system didn't.
@@hssy2jrocker America's business friendly environment is the reason for most companies and startups being there. That's not the fault of Indian students. They are incredibly smart, especially compared to Americans and Europeans but lack labs, RnD facility so they move out. If we had even a hundredth of the facility of Americans we would completely rule it, alongside Chinese(communism ruins their potential), Japanese, Korean etc.
Jee: Do it.
Me: Skip it
Jee: you...........
Ironically I came across this while procrastinating preparing for JEE advance
Imagine you just guessed an option and it came out to be correct 😂😂
Multiple correct 😂😂
Did that. Still didn't qualify 😂
@@twistedspirit lol
Negative marking?
@Riyansh Gupta but rotation questions have their own aura
Watching from IIT Bombay. She has solved it so beautifully. A bliss to watch.
Well done son see u in google soon
@@yashb4357 No need to be harsh though,it seems like you envy him lol.
Bohot bdiya IITB mention Lena jaruri that kya😏😏 vese sahi hai bhai
Vese tu to NIT K se hai na
Exactly bro. I just hope I had such wonderful teachers to teach me the subject.
In JEE Advance there are some questions which you're not supposed to attempt as they will take too much of your time.....
This was one of them....
if u r clear what to do in the qu. then this was rank gaining
@@ajayade6903 no, advanced exam is full of traps, if you get stuck at a question you are at tremendous loss, even if you solve it in 10-15mins during the exam, don't think you won, because you're still at loss.
@@ajayade6903 tere kitta rank aaya be
@@sakshamsengar9798lol 😂😂😂
@@sakshamsengar9798 hes right
the score of all the questions is the same
so it doesn't make sense to invest 5 to 10 mins on one hard qs
Aman Bansal topper of iit 2016 has solved this during the exam.....hats off to him🔥🔥🔥🔥🔥
@@alien77333 and someone who probably did solve this qn probably could not qualify.
@@morijin5568 yup
i've solved it too
@@garvvvchn8284there is a difference between solving in home and solving in exam centre
Bhai bahoot simple question hai ye
Indian exams are all about solving problems...You know the amount of problems we have in our country... Everything reflects the reality
What’s going on in India? From your pov
@@michaeljohnston3038 its covid’s reign of terror, everyday around 400k cases are recorded… but in reality there are about 700k cases each day.. sorry for broken English
@@divyanshsingh6668 oh man that's awful. Has the vaccine rollout been poor there. Probably cause rich countries bought them first. And btw your English is perfect better than some people here in the uk
@@michaeljohnston3038 some of my relatives even died infront of my eyes
@@divyanshsingh6668 sorry to hear that
i work at McDonald's wtf im here
learning is for everyone!
First of all, RUclips algorithm...
Best comment
Can you give me some free veggie burgers? I'm hungry😂😋
By you're spelling I'm sure you work at McDonald's.
Jesus Christ.!! They ask High School students those questions.?
That's how u get to the best Institute in the world (talent wise). Pass outs from IITs then go on to rule the Google and Microsofts of d world.
@@kirtigupta9753 lol kirti gupta i have cleared jee advance but all iitians are not that successful yes paper is hard but once you enter iit does not mean you will be the next ceo of google or microsoft
btw microsoft ceo is not from iit
They really do xD that's what we to solve to get a college xD
and 89 more of the same level of difficulty; to solve in under 3 hours in exam circumstances.
yes, chris, and its good u know, sometimes its really fun
I am telling you, once you are able to solve such questions on your own, the confidence you get is just next level. Worth the pain definitely.
After watching this video i have come to a conclusion. I have not understood rotatory motion physics, well enough.
She is not exactly explaining, she using the formulae of both rotatory and translatory motion.. had she actually explained all the steps the video wud have been much longer..
@Gaurav Sharma NOT India, lol. I am not sure how many of those that graduate from IIT stay and work in India. I would guess less than 2%, but that may be on the high end.
Are Bhai Bhai bhai
Just imagine the pressure on student's mind who has to solve 90 questions of same level of difficulty in 3 hours.
It's jee advanced bro u have to solve 58 questions in 90 min and all questions are not like this
And we solve these in under 3 minutes.
There's paper 2 as well
@@amanchaubey4396 no..u have to write 108 questions in 6 hours..which works out to 3 mins 20 seconds per question..idk wat ure talking about..
The number of questions isn't fixed right? I have heard that but not sure .....
**Me solving this question for 21 minutes in the examination hall**
JEE Advanced (sighs) :- Successful fucked up this man's future.
**cries in neet**
Lol
😂😂😂
Tibees is next level. I can not always grasp the math but she is really good at visualizing the problems!
2 minutes of silence for those who solved this in examination.,😎😎😎
Actually silence is for the people who died....so a moment of silence for the people who got this one on their question paper.
And lost their important time
Now think if someone guessed it right without trying to solve
I think I got it right. But I didn't solve it truly. I guessed from the options.
Actually
Tibees - This question is extremely difficult.
*AMAN BANSAL* - Hold my glass
He doesn't wears glasses
@@toukatouka5768 get some meme knowledge bro
You been living under a rock?
@@namanchhaparia4896 there was sarcasm boomer
@@toukatouka5768 ya waiting for more dis.....
loving it !
i’m a psychology student i don’t know why i’m here
😂😂
😂
Kelsie Parker ! you are here to read comments and to understand what we think .
Biology student here so I understand your feeling lol
You are conducting a test here to study the psychology of the people who reply to you.
Did I pass the test?
As an Indian that moved to the US at the age of 10, I am glad…. Just glad
same! state?
😊😊😊 Nice 👍👏😊@@ItzUnstoppableYT
Lucky you bro, lucky you😭😭
Lucky you
It's great to see someone attempting the legendary questions from IIT JEE Advanced exam.
I remember some students asking me that questions. Told them it's a very good question they should work it out themselves;)
I tried this question, 3 times, but failed, on the next attempt, I figured out the fact that angular velocity about point O when the body rotates around the O would be a vector, perpendicular to the L vector drawn from point O. And thats when I finally solved it, and took a 15 mins break after exhausting my entire brain phew.@@143TYAGI
And 3 students scored 100 percentile in physics in this question paper 🙏🙏
No way
.................
But they haven't full marks
100 percentile bro
Percentile aur percentage me farq hai lol
For someone who has solved irodov problems. This is not even the hard problems in the book. I would say medium problems.
I am preparing for JEE 2021 and while solving PYQs, I was stuck in this question. I couldn't solve this one. RUclips recommended this video after just one day😂😅
I'm preparing too bruh, had the same recommendation
Good luck to both of you.
RUclips knows everything
bruh ..found my community. ADV is still 2 months away.
Me bhi but how much percentile u got!
I had cried when this question had come in my paper.
I retook the exam next year.
Hey is there retaking option for new advanced! I didn't know that
If it's a joke then pardon me, if not, then plz inform me
@@koro-sensei9783 you get two attempts in the JEE ADVANCED. the year you finish High school and the year following it.
@@shubhamsagarsingh9451 did u get iit after second attempt
@@swaritkachroo8094 yes I did.
@@shubhamsagarsingh9451 rank bro?
Tibees: "Here is the toughest question ever put on JEE Advanced. I took 15 minutes to solve it."
Some random Indian kid preparing for JEE Advanced:"i cAn sOLve iT iN jUsT 3 MiNuTesS"
Jada ho gy😂😂
True 🙋 did it last year....in 11
Ruchika Thakur sure you did
Ruchika Thakur yeah no.
Ruchika Thakur
When solutions are available , does it even matter? 😂
Pro tip - if you get this question in JEE, ditch it and move on if you cannot solve it in like 30 seconds
Practice!
Correct,40% hi chahiye iit k liye. Ego pe nhi Lena chahiye kisi question,choose wisely.
@@GreenGoblinCoryintheHouse sahi bola bhai
Such qstns will be rare in adv paper
This question is meant for leaving only as it is time consuming and there are very less chances for it to be getting solved
After 2.5 years I'm going to sit in this exam
Pray for me..
Prayers¹²¹²
Lol
Ab tumne science li ab science tumhaari legi 😂😂
@@rahulkanda7864 😂😒
Prayers for you....RIP
This is a legendary question, i remember my physics teacher in a coaching institute was telling me how it took so many professors working on it before the answer key was published. Behold JeeAdv😎
I screenshot it and attempted it before watching. It honestly took me 30 minutes, but I got A and C.
If that's for high school students thats unbelievable. Great video.
And we have 3 mins to solve it. 😥
we have to solve this kind for 18 question for each subject pcm in just 1 hr and we are just high school students!!
Which country are you from ?
India
Not high school its for 10+2 students. That's equivalent to high school in us
I am an engineer that moved from Europe to Asia. The view on university education is very different here. It's all about the entrance exam. The exam is very hard, but students spend enormous amount of time practising similar questions over and over again. The entrance exam is indeed unrealistically difficult. It's how they select people for the good (and cheap) universities. The rest needs to go to more expensive private universities. Frankly, I think the system is a bit absurd, because it spits out many people that could have been good engineers as well and it selects others because they can pay for private tutoring specifically aimed at passing the entrance test.
Urs is the best comment
It is because they have not enough universities with good teachers and facilities.
@Samurai Jack 1 in 10000 lol
In India relatives and neighbours are more worried than the student about their education
I guess India is a very crowded place with too few universities. They can afford to only take the hardest working & smartest students.
Physics Books followed by JEE Advance aspirants
1- "Concepts of Physics" written by HC Verma
2- "Problems in General Physics" written by Igor Irodov
Add Resnick Halliday and Arihant
@@asifism4743 6 mahine pahle ka hai cooment
@@steven-fq1lv hn to kya hua;)
@@asifism4743 to bhai vo ab kyu aayega comment dekhne
justice for dc pandey.
Everyone - Ohh! Thats Tough
Kota students - Give me 1 min ma'am
Lmao what a joke...most of the students will leave this question on the very first site...only a few of them (probably the rankers or top students) would be able to go through the entire question in one go.
The people here bragging about the selection rate being 0.2% should understand that it isn't to be proud of something. Though the people clearing JEE Adv would definitely be among the smartest students out there, the low selection rate basically shows our overpopulation and the lack of enough good-quality institutes for the masses. I am an JEE aspirant too (2023) and seeing 1.1 million people compete for 17k-20k seats shouldn't be the case.
Edit: Guys I got into IIT Delhi in first try. So yeah finally over
Isi meh hi toh maza hai
If you clear it in such a competition you will have pride...... believe me. As an IIT student I am respected a lot.. and that is my pride
@@utkarshbhandari7323 Yes Utkarsh I totally agree. My sis too is in IIT D and the respect she gets mindblowing
@@rushwinvaishnav3356 bro I am just saying it to those people who were bragging about the selection rate being too low as if that itself was an achievement. Clear karne me to maja hai hi ofc
@Yath YT Yash the point of my comment was to say that the low selection rate isn't an achievement. Obviously there are a lot of good institutes but there aren't enough. Only a handful of the private ones are good enough and there aren't enough seats for students. This too is the reason why private colleges take a huge amount of "donations" from students in exchange of seats. After perhaps 100k students in JEE Mains, it all comes down to who can pay more.
If one is smart enough, he/she should have left this question.
More smarter left this exam 😎
@@doctor_docdoc ultra Pro Max
as a JEE aspirant, i must say that this is not the toughest question in JEE adv
you can see tough questions in mathematics section.
@@udaykiranreddysadula1065 the limit to integral?
Mathematics is highest challenging
@@jitadipmukherjee3127 check jee advanced 2016 limit problem, oh God..
exactly. just a bit thinking is needed right
As someone who has cracked the JEE in the past, it saddens me as to how I had completely forgotten the joy of solving problems like this till I saw this video. Thanks for bringing back some really cool memories.
I honestly think the real question is “How much crack cocaine do you need to solve this question?”
None. Becuse contiousness is necessary.
Nityanand Saswade hmm... how about caffeine, then? how many milligrams of caffeine do you need?
@@McMaster27 i dont need any outside substances including coffee, tea each to stay contious.
If i cant consanteate then i rest then i start solving issues again.
It produce less stress and external substances does supress our bodily needs and functions.
Later on in life those will strike back really hard.
Nityanand Saswade the guy was joking bruh
Nityanand Saswade stop being r/iamverysmart tier. ain’t funny, everyone knows, even geniuses know, that you need to have AT LEAST 10 grams of pure caffiene beforehand.
To those foreigners who generalize India as Bob and vagana seekers...this is another dimension of India and more real version....let that sink in for a while..
Chill it's a joke
OK very well. Only those who cannot solve this question are Bob and vagana seekers! Happy?
@@malliyana201 my happiness do not depend on your snide remarks kiddo :) ..
ITS BOB AND *VAGENE*.
Get it right.
@Abitamim Bharmal just 10% of India s population would be 50 times more than your country's population... Between I am sure with the attitude of urs you cannot even manage 2-3 people in your family while talking about India which is pretty much doing better for its ultra mega sized population...
how you hold the pen to write goes way beyond the laws of physics
rofl
I hold it like that…
That's how most people hold pen here in India.
I just got this question for my homework in my coaching 😂
Lol what😂
😂
bro same , lekin shyam mohan bhaiya ne discuss karvadiya tha the very next day
@@rudhirsaxena2187 bhai vmc se h kya?
@@puneethrk4870 bruh form your sentence correctly
Paper 1 , 9-12
Paper 2, 2-5 pm
*Patience Required !*
Life hack for JEE ADVANCED:
leave rotational mechanics
Agreed 😂
Ur right
badhva hai kya
That is actually a very very bad life hack ppl pls don’t use it as jee likes to mix RM in every question
Leave everything. Leave your life.
I still remember looking at this question with tired eyes.
My heart : Why am i even viewing it, i am not even in high school yet.
My brain : YOU ARE INDIAN!
When you have millions of kids every year, whose parents want them to become doctors or engineers, this is the only way to sift through the talent I guess. Brutal nevertheless :/ 3 minutes? Insanity.
I am one 😭😭😭
@@sanchitmehta6513 :/
@@ZygimantasA :/
this is not the correct way to measure one's talent
@@ayushtejaswi8403 that's why i am focusing on my 11th and 12th grade. after that i will bag some scholarships and move to canada for my dream - Computer science !! ;)
I was in that exam and believe me, I dont want to live that again. Happy though I got into IIT.
Did you get top 1k rank?
Fascinating what the human mind is capable of. I think I saw / solved a similar problem on a 45 min test, but that was in a university 3'rd year engineering course, not the dang entry exam! I don't think I've ever been able to do that type of problem in 3 min, but schools in America are way more relaxed. It's just interesting to know that some people can do it... crazy.
You have to solve these sort of questions to become Google's CEO.
@@DrRajReddy accha
Its just practise nothing else.
All these competitive papers and olympiads can even be solved by middle graders if they
Practise practise practise.......till infinity
Well i mean... American high schools don't even teach calculus to most students so we don't even have to go that deep to see its a joke of a comparison
3rd year engineering for University?? This is a complicated rotary motion question over topics taught in US high schools (AP courses). It's could even be one put on the end of the AP exam, it doesn't seem that far out their. Probably unlikely though.
Just to clarify, 3 minutes is the average time per question for the exam(that is, if one were to attempt all the questions). But since a very small percentage of people attempt all the questions, the majority gets aroud 10 to 15 minutes for a question of this difficulty. Most high schoolers giving the JEE are just immature attention seekers, the exam isnt even as hard as they say
Fun fact: JEE has 0.2% acceptance rate 😆
no fun it just gave me anxiety
AIIMS Delhi has
It is because of idiots who are forced to take engineering , over 1.6 million kids take for some thousand seats , for obvious reasons it's 0.2 , it's because of the number of people answering the exam.
@@peptobismolveins It's less than 0.008% for IITB CS
Still no IIT is in the top 300 list in the world ...
As a final year engineering student, I swear that the only time you met this kind of mechanical physics problem is just in your first year of study, and then you will just forget it because there's a more realistic problem to solve. The most important thing here is the way you break the problem into several equations that linked altogether, and this way of thinking is what you will use until you graduate and work in engineering profession. Btw, it's a great video to refresh your memory, thanks Toby!
Look i loved ur channel but i was very disappointed to see u being trolled by people u make quality content
Anyways keep up the good work 😃
Look sir, you're acting like your from your generation but interacting with our generation. I bet she doesn't feel anything about the trolls. THIS IS THE INTERNET!! NOT REAL LIFE.
Btw sir u have a nice channel
It's the internet get over with it.
no u
@@therealb888 Still a douchey thing to do nonetheless. I agree with the OP.
In study years ago at Sheffield city polytechnic, this type of problem appeared in exercises. You explain your solution quickly and clearly in less than 20 minutes. The lecturers teaching were very fluent using these principles in industrial design work. We learned in the real world, Strains are measurable and stresses in proposed designs are required. To find design stresses we first need to find forces , velocities and accelerations. Thank you Toby. I am interested in taking this further and a three dimensional exercise using Eulers Formulae for inertia would be of well worth watching. I have a few rough exercises on a computer memo sketch. Perhaps Toby could do a respectable version !
Rigid Body Dynamics..this is 11th grade portions and is now a pretty much classic problem to be solved in class.
Hi so...I am currently in my 11th grade. I suppose u know the chapters important for the upcoming years, if by any chance you remember it, please do share with me sister🤗
@@romananedb4117 chemical bonding, goc, functions, LCD, st lines, WPE, Com...
@@shoaibshaikh1584 bro u can't even understand
,he's just simping for her 😂
@@qproximity5510 he might be actually asking who knows...... I have seen many people asking for important things in comment section.
@@qproximity5510 Plot Twist: It's you who is Simping for her by acting as if you are trying to protect her😂
She practised 999 times before making a video. Salute.😂😂
Haha
Is it a joke or is it for real?
@@adityarajasekar5138 it is for real she did practices that sum
😂😂😂😂🤣
999 thora jada ho gaya vo solution kahi se samgha hogi
That was great... I hate to say fun, but it was great fun to watch YOU do it while thinking I don't have to!
haha
Hahaha...
Yes sir I had to in 2016. Qualified with a low rank and didn't get admission in IIT. At that time it was frustrating for me!!
Hey there santa :)
Hi
But i really appreciate your 22 mins for 1 questions 🙂
Ignorance is bliss.
Specially in this case. I won't read this question full in the real exam.
I'm an Indian student. In 2016, I've given JEEadv. exam & have attempted that question. In India, there are a lot of coaching institutes (cram schools) which prepare us mentally & conceptually to attempt such type of questions. Nearly all the students of my batch have attempted that question correctly gaining half or full marks.
Even Australian professors sweat when they see the IIT Paper.
@mathsonboard dude jee adv 2020 paper is out on jee adv ac .in go download papers from there and give it a try....and even check the marking scheme💀
@mathsonboard oh ur from asian that is why lol overpopulation sucks
@mathsonboard its true man.... The professors there finds this paper really hard... Well.. Who doesnt??
@mathsonboard duh, dude I cleared it, I'm going to IIT Delhi ranked 193 globally.. Ain't Nun wrong wit my English but its your IQ that u can't comprehend shortforms
@mathsonboard u keep doing your math on board I've switched to coding😂
I remember racing against time to solve it within 2 mins, 5 years ago (I had to save time for questions on inorganic chemistry - my weak subject)... I don't remember much formulae so I try to derive it ... Chemistry was a bit challenging for me as i didn't remember many intricate stuff/equations in inorganic chemistry either... otherwise Physics and Maths went like charm, everything was derivable..
Thanks for bringing the memories back!!
U were deriving stuff in the exam hall?
Why RUclips constantly recommending this... I'm a commerce student.
😂😂
balance sheet match nahi ho rahi bahi youtube ki iss liye kahi bhi kuch bhi laga de raha hai
@@raunakgarg4011 yes that's why I took commerce.
Bhai CA karlo IIT,UPSC sab bhul jayenge. Mein khud CA final tak kaise toh bhi pohocha😅
But The Knowledge you have In this Field is uncompeteble compare the 2
@@shubhamsingh2468 Bhai mai bhi finals me hu...
This question actually has a easier solution in DC Pandey book.
Mechanics volume 2.
Dfk Dgy champion
No
There is no solution you இடியட்
@@udhayak305 😂 anna Tamil ah ?
@@AeroSpaced296 aama thala
As a student in 11th standard in India especially in Kota (please google this place). This was one of the most difficult module for me to understand as a student. Thank you for reminding me how could I have learnt this better.
Also i was in class 11th in 2007. So yeah i see everyone as kids now 😂
Me :- class 8 ✋
Who is kid 🤔
@@user-mb4mq8th8t me too
@@user-mb4mq8th8t 😂
This is one of the most difficult chapter in class 11th and I can't do it
@@user-mb4mq8th8t 8th class students are kid than what about those who drink their mama's doodh ?
4:55 Considering velocity vector as slanted is wrong. The reason being, when you curl the fingers when taking omega slanted, the assembly rotates on a slanted plane which is totally not the premise of the question, I advise you to look into this before students make assumptions.
The instantaneous velocity is slanted. As the system rotates, the velocity vector will rotate. She is right. I think you are probably conceptualizing the average velocity over one full rotation.
@@oliverkleinmann8279 I was talking about the second vector she drew. Omega spin is fine, omega orbital that she drew later points upwards and their net resultant lies horizontally along the instantaneous axis of rotation (line joining points of contact of both discs)
@@anmoldeepsingh9281 indeed the L orbital will only point in the slanted direction while capital omega is vertical, somewhat similar to a pendulum situation.
Only the spin velocity vector will rotate while the orbital one will always point vertical
This is actually a very good idea for video content, and your way of explanation is also quite good. Thankyou.
Yeah Indians only watch videos related to Indians
@@trollwarlord368 not necessarily.
@Salik Shaikh India
@@trollwarlord368 it is not 100% correct
I would skip that question
Every qstion is similrly dfclt
@@pruthvirajgadhavi1665 no it isnt
Well with time limit.. it is
Same😂😂.
@@pruthvirajgadhavi1665 thn someone will probably skip your seat in college as well
Me: trying to solve this in three minutes
Australian with an ug : *takes 21 minutes *
Wtf JEE.....
She explained it thats why it took time
Do you solve this teaching to a million of ppl?
in the time she solved this question is equivalent to the total time given to us to solve the whole paper with equivalent hardness😂😂🤣🤣
😂😂😂😂😂😂😂
She explained the solution bro she has a degree in physics so this exam is a piece of cake for her
@@AdarshKumar-kd9yg as someone with a degree in physics, nothing about this is a piece of cake lol
@@graystone2802 actually it's a piece of cake do you think any one with a PHD degree will suffer in thi type of question . It's complex question but not upto that level 😂😂😂
@@AdarshKumar-kd9yg This is definitely a difficult problem, there is no doubt. Also, just because you have a PHD doesn’t automatically mean you will know how to solve this problem lol, physics is a huge branch of knowledge. Having a degree or PHD generally just means you have a general knowledge of the subject, and you know where to reference the specific information in case you need to use it. I passed analytical mechanics with a 95, but still I can’t solve this problem with the information I know right now, but I know for certain I could solve it given enough time and a mechanics textbook to look back on.
Great explanation! Looking forward to seeing you solve more questions from this exam :)
me too
I am so impressed with your formula recall. Although I understand everything, I don't think I would recall all the formulas that well, but obviously you had a very good education.
I saw this video when i was in 9th and was completely swept away of the thought that i was going to be bombarded with such questions in the exam i am gonna be appearing in, after 12th and today after 2 years i solved this question (it was in question sheet of my coaching ) and was able to solve it pretty quickly. All thanks to my teachers , specially BKM sir ( bharat kumar motaria) who teaches me physics. I feel so blessed today.☺️
What rank do you get in jee adv ?
Yes also in my reso sheet
I think the take away message for the last question is that you should always think before working our these kind of tedious calculations. What you should do is realize that 81*24/25 is about 81 and 17/10 is about 2. So it's easily deduced that the answer is much larger than 55 anyway, and that's all you need to answer the question correctly.
If it's intended like this then it's a great didactic question. It seperates the dilligent students from the creative students. Because at the end of the day, the creative students will make better physicist, regardless of their grades.
You are goddam right.
I am physics student..still no idea what the question is....Damm man
Thank you for explaining this problem very insightfully.
I solved that problem in exam but it was only because I had practised such rigorous problems before.
But what's painful is that I could never see the beauty in such conceptual problems.
I would just solve the problem and be like, "Yes, it's done."
I don't want to stereotype, but judging by these comments, the academic culture of college and high school aged Indian men studying to be engineers and physicists seems incredibly boastful, judgemental, and self-righteous. I think the majority of these comments can be summed up as "And you think x is hard, you should try my y curriculum or under my z time constraints." and then the ensuing flamewar of other Indian men insulting their intelligence for complaining, or bragging about how much harder they have it. This has to be one of the most toxic comment sections I've seen on a science/math video. Y'all need to seriously chill out.
well , a hardcore competitive society like that of India does that to you
That's true m8. Here cracking jee advanced is considered equivalent to attaining moksha
Thanks for writing this. Yes, everything you wrote is true.
Well said. India doesn't have any Noble Laureates, because its industrialisation of education here not really a passion to learn. Majority of students have no passion nor insight into a subject, just plain mathematics problem solvers, who cannot solve social problems or the real world without someone else who got the vision to use them for work (like Steve Jobs).
India needs MIT, Standford, Oxford etc.., not IIT.
I don't want to stereotype... "but I will, because I can" :-D ... I am not a racist... but .... :P
After 4 years of me writing this exam I am watching the solution. RUclips magic
You will experience cocaine effect on solving maths jee advanced
Hahahahahahhahahahahahhahahahahahahahahah yaaaaarr gazab bole
Ghanta utna vi hard nehi he jitna lagta he bro. I am preparing for advanced 2020. It's not that hard as people say
@@spyboy0076 stfu kiddo
@@spyboy0076 I'm also preparing for the same
What percentile u got in January mains attempt??
@@ImperialX19 98.94
Easy way to solve this:
Firstly moment of Inertia about it's axis I= (ma^2)/2+ (4m(2a)^2)/2
= (17ma^2)/2
So L = Iw=(17ma^2)w/2 option c is correct 😊
Now let r is radius of circle formed by small disc(you can take big disc also) when this system is rotated about point O
2pi(r) = n*(circumference of small disc)
2pi(r)=n2pi(a)
n = r/a and r=√(l2 +a2) Pythagoras theorem
Put l = √24a so r = 5a so n=5
w' = w/n = w/5 ( w' is angular speed about z axis) option a is correct 😉
angular momentum along z axis is
(L sinx) x is angle b/w it's axis and ground when you calculate sinx you find answers do not match with option d so do b. So d and b eliminated 😎. And correct answer is a,c it took me 2-3 min. I am Indian
Indians 💙😀
I'm in 10 standard and what did you just say? 😂😂
That Sports Guy genius*
Best keep it up bro
When you memorise all the formulas and methods then course you can do it in a few mins lmao, but others would try to think holistically and solve it from scratch. It doesn't make you smart.
I had solved this question but I took me over 7-8 minutes to do it in the exam !!!
I had a solution in which I calculated
The magnitude of angular momentum across the centre of mass first.
IIT u?
@@LifeTechnolgyDhanushAshanonaga Yep
@@samagrajain9716 wow how did u crack bro plz tell me
@@LifeTechnolgyDhanushAshanonaga Hard work and practice. No other way to do it.
@@samagrajain9716 s tnx bro and now with in 3days I will complete my syllabus of class 12 and now I have practises a Q or take a test serious?
Imagine if they spent this much time and effort in designing the system