Had this exact doubt 4 years ago, I'm so glad I worked it out in 4 hours the exact same way he did! Today I'm fully satisfied of my solution, all thanks to you, Sir!
Sir I am one of your students who attended your Workshop On Innovative Science Seminar. West Bengal, South Dinajpur. This seminar was held from Balurghat Lalit Mohan Adarsh High School. Thanks sir for all your valuable comments.❤️
I literally had this exact same doubt, and my friends weren't able to give a satisfactory answer as well, but this was an excellent explanation, thank you so much sir!
According to the question asked, my explanation would be that when we try to increase the speed of that stone string contraption, you are increasing the angular velocity by which the stone rotates, due to this increased angular velocity the centripetal acceleration increases which basically means the the centripetal force I.e. tension in this case increases. Due to increase in angular velocity, you are providing the stone angular acceleration, and due to this angular acceleration the tangential acceleration increases, which increases the velocity. Therefore the perpendicular force does not have anything to do with increasing the velocity but just the fact that it is being spun faster will increase the tangential velocity. Increased tension in the string is a by product of increased angular velocity, many times if the rock is spun too fast, the string breaks and the rock goes flying tangentially. The string breaking signifies that there was an increase in tension force which went beyond the capacity of the string and eventually broke the string. Thanks.
sir your dedication about the physics is very great and me and many more students are inspired from your attitude towards physics and definition because of you sir india will reach great height in the field of physics your book is sacred as giita for me loce you alot sir
If you consider tangential acceleration too, means accelerated circular motion... V(vec) = (mag)(v cap). Here "mag" = magnitude of velocity and "v cap" is the direction and "v(vec)" means velocity vector... And if we differentiate it wrt time you'll get dV(vec)/dt=[d(mag)/dt](v cap)+[d(v cap)/dt](mag) And you relate this equation with a (vec) = a(along velocity) + a(normal to velocity vector) ... You'll get Normal component of net acceleration= [d(v cap)/dt](mag).. this shows then the rate of change of direction of velocity vector multiplies by the magnitude of velocity give the normal component of the net acceleration...it also shows that, normal component only changes the direction of velocity vector.. 🤡🤡
Sir we are waiting for new course on electricity and magnetism Current electricity,,emi and ac etc ..... please 🙏 launch third part of electrodynamics 🙏🙏🙏🙏
I'm watching your every videos and hitting the "like" bottom, not because I'm a student but to me liking your videos and playing for no reason is my kind of "Guru dakshina" when i was in class 11 i failed in first unit test in physics but later i purchased Concept of Physics and got 81 in board exam. I have studied in Jawahar Navodaya Vidyalaya in the year 2013, Kaash uss daur mein RUclips jaisi platform aaj ke jaisa popular hoti toh shayad 95+ mujhe milta aap se woh concept direct RUclips jaisi platform mein mil jata 😢 phir bhi apko naman sir ji 🙏
How we travelled in time in future or past if we go more than light of speed and why we considered speed of light in time travel. Time travel me speed of light ka kya relation. Oo formula mujhe bhi pata hai but in real life speed of light ka time travel se kya relation hai please make a video on this
We can also prove this by dot procuct and some basic calculus... Like we can quantify this statement - " An acceleration vector that has a positive component along the direction kf the velocity will increase the speed... Acceleration vector is perpendicular to velocity, it's componenet along the velocity is zero" We will use two dinension for simplicity ... Speed (s) = |Velocity|= √Vx²+Vy² Where Vx and Vy are components arr velocity vector .. Using chain rule and then product rule and then the chain rule gives .. ds/dt =1/2√Vx²+Vy² (2Vx dVx/dt + 2Vy dVy/dt) ds/dt= 1/s × (velocity vector) dot (Acceleration vector) From this we can see that if velocity and acceleration are perpendicular, v.a=0 (dot product is zero) So rate of change of speed wrt time = 0 ...
Can we also use this video's logic to explain what gives the centripedal acceleration in the "ring on spinning rod problem" that we do in questions, as normal is always perpendicular to the motion of the ring and their is no friction in the rod.
In an Young’s double slit experiment , the slits are kept 1mm apart and a monochromatic light of wavelength 0.5mm is used to illuminate the slits . A screen is placed 1 m away from the slits . What will be the distance of - a) 1st bright b) 1st dark c) 2nd bright
My question is " Does a charge undergoing acceleration within a gravitational field emit radiation? " I have been thinking about this situation for quite some time since my 11th grade and could not come up with any possible answer. I have also asked this to many physics teachers and professors but could not get a satisfactory response. According to classical electromagnetism, an accelerating charge emits electromagnetic radiation. However this scenario touches upon the intersection of two fundamental theories in physics-electromagnetism and general relativity.
As per the law, mgh÷R = mv^2 ÷ R Or PE = KE Also we know Total energy (mv^2) Therefore on a circular motion mv^2 is always equal to PE+KE Hence Uniform circular motion Centrifugal force is equal to centripetal force but KE is always (1/2)mv^2. Cos 45 = sin45 = (1/√2) Velocity.cos45 = direction v^2 ÷ 2 = direction
Sir I am the student from where you did graduation - Patna Science College. I meet you in 2013 When you come to see my poster of black hole in competition. And said this is something different you have projected, but your chandrashekher limit value to being a black hole is wrong. I remember that moment. 😊
Good Evening sir🙏 I'm student of 11th . My question is *Why do we prefer thin metallic wires braided together than a thick rod to be used in cranes?* I know braided thin wire provides flexibility to the wire but why do it so and how.
The fact that speed doesn't change upon a perpendicular force remains true for both the situations discussed: uniform circular motion as well as projectile motion. The confusion is with the velocity vector which, under a perpendicular force, may undergo a change in its original direction and so on and so forth with time. And, lots of thanks to HC Verma sir for clarifications on this issue.❤
Sir during pre exam of 10th a question have asked in my exam that if the refraction doesn't occur in two different medium then the value of angle incidents and angle refraction will be the question was too easy that both are = 0⁰ but as we know that sin i /sinr= refractive index so from this sin i / sinr should equal to 1 but sin 0 equal to 0 and 0/0 is undefined
But I have a doubt,should not the Direction of horizontal component of velocity change as gravity acts perpendicular to it.I am not talking about the magnitude of horizontal velocity,it will remain constant but its direction should change.Please anyone clear my doubt 🙏
Hello Sir My name Vaibhav Kumar Upadhyay Today you come to Mahuja, Our Village . I felt very happy. Thank you Sir Did you liked our projects? Earthquake detector.
Please explain this: If I am lying at the bottom of a swimming pool looking upward... my friend standing outside is watching me... will it happen that if I orient myself at such a position (beyond critical angle) that My friend stops seeing me and I could see my own clear image under the water (clearer than a mirror) due to Total internal reflection?
Sir I have a doubt In photoelectric effect we say it is the emission of photoelectrons (elcectrons) from the metal surface due to incident light . But then why light / photons are also emitted . If it is due to electrons jumping from higher to lower energy level then how are electrons emitted ? Many questions ask the number of photons emitted even in 1 jee pyq
Res sir May we assume the resultant effect of centripetal and centrifugal force. It is virtual but centripetal is greater than centrifugal so direction change and tilted towards it. After delta t time direction of force and velocity vector change simultaneously.
Sir aapke explanation ke hisaab se kya hum aisa bol sakte hai ki projectile motion me conservative force hota hai or circular motion me non conservative force???
Sir, when we fall down 2 particles first t=1 sec and 2 nd t=3 sec,then t=3 sec particle reach first in group, it is because of aerodynamic but why we not tell this is because of mass..so why we consider at aerodynamic concept not mass concept and also think is there g more than 9.8m/s^2 .( This particles are not in vacuum)...
Why some substance doesn't mix well with water like saatu? And why magic sand use a bubble layer to not get wet it is like a hydrophobic sand sujal pandey class 11 bokaro
An other explainition is that , we know according to work energy theoram that when work is done on a body it change the k.E of the body if there is no work then there will be no change in k.E and hence no chang in velocity. This the case here in this question when force is toward center and velocity is along tangent then displacment is also along velocity thus there is angle of 90 between force and displacment and work done is zero therefore change in k.E is zero and hence change in velocity is zero in terms of magnitued
Sir next time whenever you make a video to answer any question then please give us a chance to think and comment by asking the que on one day and answering it next day
Sir myself is sachin agrahari from jaunpur, up. Currently I am in standard 11..... Sir plz tell me the fundamental defference between momentum and kinetic energy and physical institution for them as different physical quantity. Sir I have very strong desire to know tha why we have define the both not one of them only... Does in any scenario they can be treated as interchangeably or not.
Sir I have a question. I am Jahnvi of class 12th sir why only a moving charge experiences the magnetic force and not a static charge?? And Why a static charge produces electric field but not magnetic field how is this possible as when velocity is constant and a particle is accelerated it produces an electromagnetic wave.
Sir I'm Abaneesh Mohapatra from odisha Rourkela of class 9 , I have a doubt In a concept of fluid mechanics I.e. A beaker is filled with water and a ice cube is partially floating in it and a coin is placed over it , after the ice melt, the water level decreases (why?) Thank you
Because the coin is on ice cube 🧊 and due to coin weight the ice 🧊 taking much space of water and when the ice 🧊 got melt than the water take lesser spane than the ice 🧊 and water level got decreases
seee the beaker is fully filled so when ice cube is placed a type of force called buoyont force act on it now for fully submerging or melting u can take here it must displace equal water from the beaker and hence there is no change inwater level as water has been displaced out but the coin here displaces the extra water and hence water level decreases as ofc coin is not participating in the quantity of water level
Sir I have lot of questions and need solution as please explain is neutral wire in a circuit can shok someone if yes or no then why. I know all answers but still thinking solution from you.
Sir 11th physics mein sab kuch consider or let hi kyu Kiya jaata hai , Saare article isolated system mein kiye jaate hai , real life mein kabhi isolated nahi hota toh kya saare article bekar hai
Namashkar sir I am Deepak ,(class 11th) Sir jab hum ik ball ko horizontally ghumate hai apne upar jo ki string se bandhi hue hai to jab wo Puri tarah straight ho jati hai tab tention ko to mrw²balance kar leta hai lekin us samay gravitational force ko konsa force balance karta hai jisse wo ball niche nahi aati
@@DeepakParmar-th2gw if stone become parallel to ground then there will be no force that will oppose the weight force of stone hence stone will fall down
![Sean Rii, Karyon, Sharzkii - Taungule [My Love] (Official Music Video)](http://i.ytimg.com/vi/eJoMuypbSzQ/mqdefault.jpg)
Gahre concepts hindi mein itne saral tarike se.
Pranam shreeman, jeete rahiye 🙏
Had this exact doubt 4 years ago, I'm so glad I worked it out in 4 hours the exact same way he did! Today I'm fully satisfied of my solution, all thanks to you, Sir!
Well done and keep shining! 👍
Sir I am one of your students who attended your Workshop On Innovative Science Seminar. West Bengal, South Dinajpur. This seminar was held from Balurghat Lalit Mohan Adarsh High School. Thanks sir for all your valuable comments.❤️
Legendary Explanation 🙏 by Legendary Teacher 🙂
I literally had this exact same doubt, and my friends weren't able to give a satisfactory answer as well, but this was an excellent explanation, thank you so much sir!
sir THIS IS EXACTLY MY DOUBT IN WHOLE PHYSICS I LEARNT TILL NOW THANK YOU
According to the question asked, my explanation would be that when we try to increase the speed of that stone string contraption, you are increasing the angular velocity by which the stone rotates, due to this increased angular velocity the centripetal acceleration increases which basically means the the centripetal force I.e. tension in this case increases. Due to increase in angular velocity, you are providing the stone angular acceleration, and due to this angular acceleration the tangential acceleration increases, which increases the velocity. Therefore the perpendicular force does not have anything to do with increasing the velocity but just the fact that it is being spun faster will increase the tangential velocity. Increased tension in the string is a by product of increased angular velocity, many times if the rock is spun too fast, the string breaks and the rock goes flying tangentially. The string breaking signifies that there was an increase in tension force which went beyond the capacity of the string and eventually broke the string.
Thanks.
sir your dedication about the physics is very great and me and many more students are inspired from your attitude towards physics and definition because of you sir india will reach great height in the field of physics your book is sacred as giita for me loce you alot sir
I had same doubt since last year, thanks for this amazing explanation, sir!
Truly a living legend! 🙏
❤IIT KANPUR ❤
Why?
Dickridin❤️❤️❤️
@@medicalstudies2356💀🤣🤣
@@medicalstudies2356found the jeeneetard
My brother in iit k
thanks sir your explanation is fantastic🙏🙏🙏
Had not thik about it before!!
So satisfactory explanation❤
If you consider tangential acceleration too, means accelerated circular motion...
V(vec) = (mag)(v cap). Here "mag" = magnitude of velocity and "v cap" is the direction and "v(vec)" means velocity vector...
And if we differentiate it wrt time you'll get
dV(vec)/dt=[d(mag)/dt](v cap)+[d(v cap)/dt](mag)
And you relate this equation with a (vec) = a(along velocity) + a(normal to velocity vector)
... You'll get
Normal component of net acceleration=
[d(v cap)/dt](mag).. this shows then the rate of change of direction of velocity vector multiplies by the magnitude of velocity give the normal component of the net acceleration...it also shows that, normal component only changes the direction of velocity vector.. 🤡🤡
🤡
@@Ellascreamzz 🙄?
🌝🌝🤯
Same doubt... amazing explanation sir!
Many people maybe genious but they cant teach efficiently. But He is genious. As well as a great teacher. Lots of love❤ and respect to you sir!🙏🙏
Very true!
Pure soul with zero haters❤
Amazing explanation sir! Thanks.
Sir we are waiting for new course on electricity and magnetism
Current electricity,,emi and ac etc ..... please 🙏 launch third part of electrodynamics 🙏🙏🙏🙏
I'm mbbs student..still I'm watching your videos.The way of explaining concepts of physics it's great...
Physics is the ultimate science of the universe
@@whykoksno
@@medicalstudies2356 then what is?
I'm watching your every videos and hitting the "like" bottom, not because I'm a student but to me liking your videos and playing for no reason is my kind of "Guru dakshina" when i was in class 11 i failed in first unit test in physics but later i purchased Concept of Physics and got 81 in board exam.
I have studied in Jawahar Navodaya Vidyalaya in the year 2013, Kaash uss daur mein RUclips jaisi platform aaj ke jaisa popular hoti toh shayad 95+ mujhe milta aap se woh concept direct RUclips jaisi platform mein mil jata 😢 phir bhi apko naman sir ji 🙏
Thank u so much sir u r my inspiration ❤
How we travelled in time in future or past if we go more than light of speed and why we considered speed of light in time travel. Time travel me speed of light ka kya relation. Oo formula mujhe bhi pata hai but in real life speed of light ka time travel se kya relation hai please make a video on this
We can also prove this by dot procuct and some basic calculus...
Like we can quantify this statement - " An acceleration vector that has a positive component along the direction kf the velocity will increase the speed... Acceleration vector is perpendicular to velocity, it's componenet along the velocity is zero"
We will use two dinension for simplicity ...
Speed (s) = |Velocity|= √Vx²+Vy²
Where Vx and Vy are components arr velocity vector .. Using chain rule and then product rule and then the chain rule gives ..
ds/dt =1/2√Vx²+Vy² (2Vx dVx/dt + 2Vy dVy/dt)
ds/dt= 1/s × (velocity vector) dot (Acceleration vector)
From this we can see that if velocity and acceleration are perpendicular, v.a=0 (dot product is zero)
So rate of change of speed wrt time = 0 ...
Can we also use this video's logic to explain what gives the centripedal acceleration in the "ring on spinning rod problem" that we do in questions, as normal is always perpendicular to the motion of the ring and their is no friction in the rod.
Loved the explanation...
Amazing explanation sir ❤
In an Young’s double slit experiment , the slits are kept 1mm apart and a monochromatic light of wavelength 0.5mm is used to illuminate the slits . A screen is placed 1 m away from the slits . What will be the distance of -
a) 1st bright
b) 1st dark
c) 2nd bright
Aap bhi best hai 👍 aur rajwant sir bhi ❤💎 love u rajwant sir ❤
Awesome explanation sir
Very nice explanation sir❤
Amazing discussion
Wonderful explanation
Very very nice explanation sir 🙏
Feeling proud after solving this question
Best explanation sir👑
Thank u so much ji❤
Living embodiment of Physics 😊
धन्यवाद सर बला मूळे वेग वाढतो, कमी होतो,लंब असेल वेगाची दिशा बदलली पाहिजे छान स्पष्टीकरण दिलात त्याबद्दल धन्यवाद
There should be no confusion at all now as explained so precisely by your goodself sir.
अरे दादाजी आप का समझाने का तरीका थोड़ा सही लगा हमें।
❤ thanks sirji
My question is " Does a charge undergoing acceleration within a gravitational field emit radiation? " I have been thinking about this situation for quite some time since my 11th grade and could not come up with any possible answer. I have also asked this to many physics teachers and professors but could not get a satisfactory response. According to classical electromagnetism, an accelerating charge emits electromagnetic radiation. However this scenario touches upon the intersection of two fundamental theories in physics-electromagnetism and general relativity.
At atom level all the physics law breaks......
Love you sor jii❤
As per the law,
mgh÷R = mv^2 ÷ R
Or PE = KE
Also we know
Total energy (mv^2)
Therefore on a circular motion
mv^2 is always equal to PE+KE
Hence
Uniform circular motion
Centrifugal force is equal to centripetal force but KE is always (1/2)mv^2.
Cos 45 = sin45 = (1/√2)
Velocity.cos45 = direction
v^2 ÷ 2 = direction
Thank you sir
Sir I am the student from where you did graduation - Patna Science College. I meet you in 2013 When you come to see my poster of black hole in competition. And said this is something different you have projected, but your chandrashekher limit value to being a black hole is wrong. I remember that moment. 😊
Nice video
Here are one more legend in the earth 🌎
Good Evening sir🙏
I'm student of 11th .
My question is
*Why do we prefer thin metallic wires braided together than a thick rod to be used in cranes?*
I know braided thin wire provides flexibility to the wire but why do it so and how.
The fact that speed doesn't change upon a perpendicular force remains true for both the situations discussed: uniform circular motion as well as projectile motion. The confusion is with the velocity vector which, under a perpendicular force, may undergo a change in its original direction and so on and so forth with time.
And, lots of thanks to HC Verma sir for clarifications on this issue.❤
Sir during pre exam of 10th a question have asked in my exam that if the refraction doesn't occur in two different medium then the value of angle incidents and angle refraction will be the question was too easy that both are = 0⁰ but as we know that sin i /sinr= refractive index so from this sin i / sinr should equal to 1 but sin 0 equal to 0 and 0/0 is undefined
But I have a doubt,should not the Direction of horizontal component of velocity change as gravity acts perpendicular to it.I am not talking about the magnitude of horizontal velocity,it will remain constant but its direction should change.Please anyone clear my doubt 🙏
🙏🙏 thanks
Thankyou sir
Hello Sir
My name Vaibhav Kumar Upadhyay
Today you come to Mahuja, Our Village . I felt very happy.
Thank you Sir
Did you liked our projects?
Earthquake detector.
Thank you
Please explain this:
If I am lying at the bottom of a swimming pool looking upward... my friend standing outside is watching me... will it happen that if I orient myself at such a position (beyond critical angle) that My friend stops seeing me and I could see my own clear image under the water (clearer than a mirror) due to Total internal reflection?
Physics me. 0. Ka use kyu karte hai joki infinite proof nhi hauya hai. Please sir reply this question
Sir I have a doubt
In photoelectric effect we say it is the emission of photoelectrons (elcectrons) from the metal surface due to incident light . But then why light / photons are also emitted . If it is due to electrons jumping from higher to lower energy level then how are electrons emitted ?
Many questions ask the number of photons emitted even in 1 jee pyq
Long live legend H.C. Verma sir 😊❤
sir ek video bna do angular momentum ke upar pls
Guru ji👏👏👏
❤❤❤❤❤
Thanks🙏 sir ji
Res sir
May we assume the resultant effect of centripetal and centrifugal force. It is virtual but centripetal is greater than centrifugal so direction change and tilted towards it.
After delta t time direction of force and velocity vector change simultaneously.
Sir aapke explanation ke hisaab se kya hum aisa bol sakte hai ki projectile motion me conservative force hota hai or circular motion me non conservative force???
Sir, when we fall down 2 particles first t=1 sec and 2 nd t=3 sec,then t=3 sec particle reach first in group, it is because of aerodynamic but why we not tell this is because of mass..so why we consider at aerodynamic concept not mass concept and also think is there g more than 9.8m/s^2 .( This particles are not in vacuum)...
Wow sir,
You're looking like Newton.. similar hairstyle❤
Why some substance doesn't mix well with water like saatu? And why magic sand use a bubble layer to not get wet it is like a hydrophobic sand sujal pandey class 11 bokaro
An other explainition is that , we know according to work energy theoram that when work is done on a body it change the k.E of the body if there is no work then there will be no change in k.E and hence no chang in velocity.
This the case here in this question when force is toward center and velocity is along tangent then displacment is also along velocity thus there is angle of 90 between force and displacment and work done is zero therefore change in k.E is zero and hence change in velocity is zero in terms of magnitued
thanks sir u always make us explore physics in different ways.
❤❤❤❤❤❤
Sir next time whenever you make a video to answer any question then please give us a chance to think and comment by asking the que on one day and answering it next day
Video pause kar ke agle din dekh le
Good
Living legend 🙏
Sir
I'm having problem in Finding the electric flux linked with the curved surface of vase
Sir ham aap se baat kaise kar sakate hai ❤
And same is the concept for cyclotron,when perpendicular force increase the velocity of electron also increases in circular direction.
Sir, As we know that Scaler quantity can't have negative value. So how the work is Negative although it is Scalar
Namaste sir ji
How angular frequency is scalar
Sir myself is sachin agrahari from jaunpur, up. Currently I am in standard 11.....
Sir plz tell me the fundamental defference between momentum and kinetic energy and physical institution for them as different physical quantity.
Sir I have very strong desire to know tha why we have define the both not one of them only...
Does in any scenario they can be treated as interchangeably or not.
I had same doubt while reading wpe k=p²/2m
sir, why magnetic field is caused?
Sir ❤
Sir I have a question. I am Jahnvi of class 12th sir why only a moving charge experiences the magnetic force and not a static charge?? And Why a static charge produces electric field but not magnetic field how is this possible as when velocity is constant and a particle is accelerated it produces an electromagnetic wave.
Guru ji baal kata lete,kitne acche lagte❤
Sir I'm Abaneesh Mohapatra from odisha Rourkela of class 9 , I have a doubt In a concept of fluid mechanics
I.e.
A beaker is filled with water and a ice cube is partially floating in it and a coin is placed over it , after the ice melt, the water level decreases (why?)
Thank you
Because ice has greater volume than water
@@krishnagupta33452 no but even after the ice melts the water lever doesnt change
hey i got the solution.. its too long to type in chat, hit me up if u want the picture
Because the coin is on ice cube 🧊 and due to coin weight the ice 🧊 taking much space of water and when the ice 🧊 got melt than the water take lesser spane than the ice 🧊 and water level got decreases
seee the beaker is fully filled so when ice cube is placed a type of force called buoyont force act on it now for fully submerging or melting u can take here it must displace equal water from the beaker and hence there is no change inwater level as water has been displaced out but the coin here displaces the extra water and hence water level decreases as ofc coin is not participating in the quantity of water level
Sir bhautiki ki samjh part2 Kab aa rahi hai..hum bahut excited hai..please tell me sir🙏
❤❤❤❤❤❤❤❤❤❤
🎉
Couldn't realise this video was 10 minutes long!!
Great Explaining sir
Sir I have lot of questions and need solution as please explain is neutral wire in a circuit can shok someone if yes or no then why. I know all answers but still thinking solution from you.
Namste guru ji
Sir
What is speed of our ?
Earth is revolving around Sun at some speed and Sun is also moving so at what speed we are moving?
DIMENSIONS OF Snth(displacement in nth second)
Please explain this
Some teachers are saying [LT^-1] and some are saying [L]
Which is correct?
Sir 11th physics mein sab kuch consider or let hi kyu Kiya jaata hai ,
Saare article isolated system mein kiye jaate hai , real life mein kabhi isolated nahi hota toh kya saare article bekar hai
Namashkar sir
I am Deepak ,(class 11th)
Sir jab hum ik ball ko horizontally ghumate hai apne upar jo ki string se bandhi hue hai to jab wo Puri tarah straight ho jati hai tab tention ko to mrw²balance kar leta hai lekin us samay gravitational force ko konsa force balance karta hai jisse wo ball niche nahi aati
String kabhi Puri trhe straight nhi ho skti
So when string is at some angle with horizontal , a component of tension will balance mg
@@krishnagupta33452 kyo nahi ho sakti???
@@DeepakParmar-th2gw if stone become parallel to ground then there will be no force that will oppose the weight force of stone hence stone will fall down
Sir please tell me how I start my jee preparation from class 9
Sir please solve the controversial chimney problem of JEE.