These lectures are true treasure. It's almost like youtube was invented so they can be shared here. Thank you professor, for bringing your love for physics to many people out there.
one of the greatest physicists ever lived thank you prof lewin for helping us as students and God bless you. brian from south africa university of zululand
Here most of the Indian students are demotivated by their teachers as the Indian teachers only love to show their knowledge not to teach students...Thank you Sir..you are the best teacher I have seen ever...🙏🙏❤
I'm in a Indian boy, I'm in 11th grade and i used to watch your videos for practical experience as a suppliment for my neet preperation. Thank you❤ prophesor
"PHYSICS WORKS AND I STILL ALIVE" The great speech and it gives me goosebumps everytime when I study physics. Thanks professor. Love and respect from India 🇮🇳🙏🇮🇳
I'm a high school student from Sweden. At the start of the first Phisycs course, we learn about experiments and how uncertain an experiment can be. For example: It covers human aspects like observation and reaction time to name a few. It also covers technological factors like our equipment and our measurement tools. Very useful! Love your lectures!
You are the best physics teacher I have ever seen. I heard about one of your quotes which says that teachers who make physics boring are criminals.:) ever since then , I have been watching your lectures. I have visualised and learnt a lot of things Thank you so much :)
Waoh am a student.... In college have didcated my whole time helping friends with problems in physics I have never understand Conservation Law The way I did today professor..... Thank you professor
Speechless..I dont have words !!!!!! Like how can a person be so good in physics....you are actual and true inspiration who aim for physics in future; Thanks a Lot sir for igniting the inspiration among us...sending you Lots of love; Hope your well sir;!
Your lectures never cease to amaze me.....You have the capability to turn a difficult lesson into easiest chapter that can ever exist..... your lectures helped me to explore different topics ... Thank you to the power infinity ♾️ .....Lots of love 💕 from India.
teachers like you makes physics interesting i love physics but after watching you lecture i fall in love with physic i also want be like you sir thanks for inspiring
I am a high school 12 grade students preparing for NEET exam ....your lectures helped me a lot while i am preparing....real realistical conceptual funny .....love you sir
Fantastic show, Doctor! Great teachers are showmen, and you're outstanding! Slowing the footage to 0.25 made the final minute of the presentation THRILLING!
@@lecturesbywalterlewin.they9259 You're welcome, Doctor. I have a special love of pendulums as a musician (and a former physics teacher), and I have created metronomes of every variety from Winkel's ideas (Harrison used the double-weighted even before in one of his marine chronometers) to Weber's Rhenish inch pendulums for timing. I wonder, if it's no bother, do you know of a time when in the 18th or 19th centuries that scientists like Young or musicians like Beethoven might have used the OSCILLATION instead of the VIBRATION when determining metronome markings for their works ... super curious if you might know. Thanks again, and keep on doing what you do; you're amazing at capturing our attention!!!
@@lecturesbywalterlewin.they9259 Statement: By matching vibrations (beat rates) of two sets of physical and simple pendulums (+/- 0.1 beats) and measuring them (+/- .003 M), I find that the physical pendulum and the simple pendulum have a 1.5:1 ratio with respect to L; therefore, the formula for a physical pendulum as shewn in the video is: T= 2π ((2/3)*(L/g))^(1/2) NB: The mass (M) (because of its equal distribution in the phys. pend.) and the displacement angle (b) (too small to fall out of isochronism) are not necessary in this equation.
I am a 7th grade student , Your lecture makes me a passionate lover of physics Thank you sir for making a very complex subject like physics so easier for us 🙏🙏
Brilliant lecture. I am an electronic/electrical engineer with a PhD in acoustics, that has loved physics - particularly astrophysics - for years. I am by no means an expert, but I have managed to (whether it be accidentally or not) find myself correct in many debates with those - including astrophysicists - that are smarter and/or more respected/educated than me. I remember proposing the anti-photon as a reason for the double slit experiment, getting laughed at in university for it, but then being asked to come back and explain how it might work. But, over the years, as I have followed physics - particularly astrophysics - I have an uncertainly about some aspects of conservation of energy. Namely the claim that energy can't be created or destroyed. As such, I have come to the conclusion that - if modern day astrophysics is to believed; A) Energy can be created or destroyed; and it doesn't only change from one form to another. B) Energy conservation only is local. Examples within the universe where energy is created/destroyed, are as follows . . . Evaporating black holes are one, and the decaying cosmic microwave background is another. Where is the heat energy from the latter (the decaying cosmic microwave background) going; if not being destroyed? Also, where is the information, heat, and other energy from the former going; if not being destroyed?
I think sir Walter Lewin is the toolsy to make physics more enjoyable to people.He has proved that 'Physics' is not a simple word . It's a dream , it's a reality.Thanks a lot for spreading the love of physics
Professor I am from country called NEPAL and I am just at 9th stander though I understand your all videos. You really explain in very simple and realistic way. Heartly thanks professor
At 10:47 I think the Reason why your Grandmother was right is hidden in Gravity When we are Vertical Sir our neck muscles stiffen hence shorter And when we are horizontal our muscles relax and no unnecessary strain on muscles so they can relax hence longer... It is like the spring under weight and spring lying horizontally
This lecture was not just a regular one, it is more of an exhibition and the one who on stage to perform it was our great lecturer of all time. Thank you sir Lewin for having show me the beauty of physics again after so long… ❤❤ Hope you still doing well.
I am a jee aspirant from india , I would like to bow down to you professor 🤗 for your practical visualisation of concepts that help me a lot in a deeper understanding of physics ...❤️ Again thankyou sir ❤️
THE STUDENT THERE ARE ACTUALLY LUCKY......PHYSICS WORKS 100 PERCENT CORRECT SIR....I AM LOVING PHYSICS ONLY BECOZ OFYOU SIR...,,,TEACHERS LIKE YOU WAS VERY RARE NOWADYS SIR ..IN THIS GENERATION TEACHERS ARE JUST TEACHING FOR NAME SAKE...BUT YOU OPENED MY EYES IN THE WAY I SAW THE PHYSICS.....LONG LIVE WALTER LEWIN ....SIR
Sir well, I am from India but feeling love with your videos and obviously watching this video nearly after 5 years ..................................................
Hello professor . In the experiment with Tiffany at 10:27 we got the Horizontal length to be shorter than vertical.. But in theory it say that the Vertical length must be shorter.. And I wanted to end saying your lectures have made a huge impact in my life where it's hard to afford education ..By your help i try to learn all I can . I am very grateful for that .. Thank you
I am a history student , but nowadays I watched some of your videos and it made me intrested in physics, so in my 5th semester I opted Astronomy and astrophysics as my opencourse subject
There was so much more I wanted to tell you when I had the opportunity to meet you last July. I was very fortunate to take physics in high school... We did go over error! Many of the experiments you perform in 8.01 we did in high school lab :)
@@lecturesbywalterlewin.they9259 I hope you're safe during this time. My heart goes out to any directly affected by this pandemic... I've been in self-quarantine for about a month here on Long Island and am looking forward to a time when I can resume my trips to Cambridge... I'm sure we all are looking forward to a return to normalcy...
Well, this man was born in the Netherlands (yes, in Yurp, next to Germany) in 1936 and around 1965 he started working at MIT. So he grew up without inches and feet! I am Dutch too, I know the problem. The rest of the world is in love with inches, feet, stones, two tastes of miles, Fahrenheit and whatever. I can not get used to these strange numbers and I don't want to know what Fahrenheit was thinking. The only one scale more bizar is Delisle. The higher the number, the colder it is. Yes, an inverted scale. Great. Of course we understand and if needed we get used to your units soon enough, but a scientist must get tired of all those conversions before and after the actual calculations. Or he must use different constants for the oldfashioned units, which is just as annoying. Tradition is okay, but it has toooo many drawbacks. A funny example was a giant hot air balloon, a Frisian cow. Drawing was in centimeters, and it was produced in the UK, in inches. That's a whole lot of volume more than expected. So, the balloon pilot said no thanks, and in the end somebody else bought it and installed a very large basket. This is a true story and there have been more cases of confusion just like this one. Awkward. So, thumbs and forearms and feet and stones, funny, but no thank you. No hard feelings, people start argueing about such things, viewers of this video know better. It is the way it is. At least I hope you liked the giant flying cow!
🥺💬 Very nice example as he told angular velocity concerns as external force. 🥺💬 He is correct Energy conservation, if no additional force applying then it cannot change direction or target height.
Maybe the aluminium bar *does* become shorter (for some definition of "shorter") when it is upright. But, because the measuring tape is subject to a similar effect when that itself is upright too, you would not be able to tell locally. I'd think you need an outside observer at the very least... it's getting complicated fast :D
People find it unbelievable that when released from a stationary position a weight dropping vertically and a pendulum covering the same loss in height would emerge with the same final speed , and yet the distances covered and the time taken are different. Would need some elaborate equipment to show all this while using the pendulum to cover larger angle of swings rather than the approximation at smaller angles.
+Carmel Pule' Gravity is the ONLY force that does work when we drop an object or when we swing a pendulum. Since work is the dot product between the force and the displacement, in both cases you find that all that matter is the vertical distance that the objects travel. If we drop an objects from the same height from which we drop the pendulum the dropped object will have a higher speed as it hits the floor than the pendulum at its lowest point as the vertical distance displacement of the dropped object is larger. KE=mgh. thus the speed is sqrt(2gh).
I recall once reading that early attempts to address weight vs acceleration of falling was done by experiments with balls rolling down inclines rather than objects dropped from heights. Is that correct? If it is, I wonder whether they would have come across the 'hollow vs solid" phenomenon of cylinder rolling you talk about in another lecture, and if the physics of that time was able to explain that phenomenon. If they could not, do you know from history about when the further discoveries about angular kinetics were made? Thanks.
drop (start zero speed) object on Earth from H meter above the ground. H=0.5gt^2 t= (H/(g*0.5))^0.5 g on the moon is 6 times lower than on Earth. Thus t will be sqrt(6) times larger on the moon.
@@lecturesbywalterlewin.they9259 Could I just ask one more clarification. Acceleration is due to a change in speed but is also due to a change in direction i.e. if I am driving at constant speed in a straight line and suddenly turn to avoid a collision, I will experience a force due to a change in direction i.e the direction component of the velocity vector, since I maintained the same speed (magnitude). And is the acceleration the rate of change of direction as it would be with rate of change of speed? Thanks again
Sir Can you deeply explain me ? Why does gravitational force is attractive ? What is reason behind this attraction between two objects ? I tried many times know about the real reason of this attraction at quantum level but i could not know . Please explain me
Good to see other Professors in the audience, getting some teaching tips maybe ? Or just for the entertainment I think. Is that Professor Edmund Bertschinger in the front row ? Very entertaining and refreshing, thank you.
![Felix "Unfair" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/Oswujxm2Ag0/mqdefault.jpg)
I'm an Indian kid and we starve for practicality thankyou sir...loads of respect to you🇮🇳
I feel you. Especially the ones aiming for JEE. Only formulas, no practicality
@@aryanshrivastava8312 I know that mate.
@Free Hongkong It's wrong bro
Indian teachers are very creative
I can understand
@@aryanshrivastava8312 finally someone with same thoughts
These lectures are true treasure. It's almost like youtube was invented so they can be shared here. Thank you professor, for bringing your love for physics to many people out there.
You are very welcome
I am a high-school student, your lectures make me so interested in physics! you're great
great!!
And now you are in the University
Please respond people above, are you graduated ? persuing phd?
Yap bro Really amazing ❣️🥀
Now u r in college
one of the greatest physicists ever lived thank you prof lewin for helping us as students and God bless you. brian from south africa university of zululand
:)
Here most of the Indian students are demotivated by their teachers as the Indian teachers only love to show their knowledge not to teach students...Thank you Sir..you are the best teacher I have seen ever...🙏🙏❤
You are not correct . It may be your personal experience.
Right
I'm in a Indian boy, I'm in 11th grade and i used to watch your videos for practical experience as a suppliment for my neet preperation. Thank you❤ prophesor
"PHYSICS WORKS AND I STILL ALIVE"
The great speech and it gives me goosebumps everytime when I study physics.
Thanks professor.
Love and respect from India 🇮🇳🙏🇮🇳
The brilliance of explaining difficult to understand subject matters into an entertaining lecture is amazing to watch.
Prof. Lewin , I like your lectures and the spirit of altruism to give knowledge
+Fjorida Panxhi Thank you Fjorida!
May Almighty God give him strength and health as he helps many people
This was the first lecture I had ever watch in my life.
You are my most loved professor. Thank You Sir for making such a valuable interest.
I'm a high school student from Sweden. At the start of the first Phisycs course, we learn about experiments and how uncertain an experiment can be. For example: It covers human aspects like observation and reaction time to name a few. It also covers technological factors like our equipment and our measurement tools. Very useful!
Love your lectures!
You are the best physics teacher I have ever seen. I heard about one of your quotes which says that teachers who make physics boring are criminals.:) ever since then , I have been watching your lectures. I have visualised and learnt a lot of things
Thank you so much :)
I'm a junior high school student, and I truely loveeee the way you explain, You're a true Legend sir. I wanna be like you, one day.
Waoh am a student.... In college have didcated my whole time helping friends with problems in physics I have never understand Conservation Law The way I did today professor..... Thank you professor
Seriously wanna hugg this man ,huge respect, everything we have been writing down , now makes sense to me, he made everything look so easy ....
I am a 10th grade student and I feel your explaination way more accurate and easier than many of my science teachers!
Respected Walter,
Great respect for a great teacher from Pakistan.
I pray for you that you may spend your life with good health and live longer.
Who the f is David?
Who's David
Speechless..I dont have words !!!!!! Like how can a person be so good in physics....you are actual and true inspiration who aim for physics in future; Thanks a Lot sir for igniting the inspiration among us...sending you Lots of love; Hope your well sir;!
Wow, thank you
i have never seen a video of science but this was interesting. what a great teacher!
:)
Absolutely amazing presentation of physics!!! I have to watch more!!! Your desire to educate is impeccable.
:)
Your lectures never cease to amaze me.....You have the capability to turn a difficult lesson into easiest chapter that can ever exist..... your lectures helped me to explore different topics ...
Thank you to the power infinity ♾️ .....Lots of love 💕 from India.
It's my pleasure
teachers like you makes physics interesting i love physics but after watching you lecture i fall in love with physic i also want be like you sir thanks for inspiring
You are a great boon sent by the almighty to the world of PHYSICS sir !
My guess is that the "almighty" had more important things on her mind.
www.numericana.com/fame/#lewin
Thank god this stuff is free. Im in 9 , you're lectures are helping me get more curious and reasonable . Sir I'm a MIT aspirant too :)
Mee too;
I am a high school 12 grade students preparing for NEET exam ....your lectures helped me a lot while i am preparing....real realistical conceptual funny .....love you sir
Fantastic show, Doctor! Great teachers are showmen, and you're outstanding! Slowing the footage to 0.25 made the final minute of the presentation THRILLING!
thanks for your kind words
@@lecturesbywalterlewin.they9259 You're welcome, Doctor. I have a special love of pendulums as a musician (and a former physics teacher), and I have created metronomes of every variety from Winkel's ideas (Harrison used the double-weighted even before in one of his marine chronometers) to Weber's Rhenish inch pendulums for timing. I wonder, if it's no bother, do you know of a time when in the 18th or 19th centuries that scientists like Young or musicians like Beethoven might have used the OSCILLATION instead of the VIBRATION when determining metronome markings for their works ... super curious if you might know. Thanks again, and keep on doing what you do; you're amazing at capturing our attention!!!
@@thomashughes4859 If you like pendulums, try to solve my Physics Problem #3 ruclips.net/video/8AUxW0rEk1Q/видео.html
@@lecturesbywalterlewin.they9259
Statement: By matching vibrations (beat rates) of two sets of physical and simple pendulums (+/- 0.1 beats) and measuring them (+/- .003 M), I find that the physical pendulum and the simple pendulum have a 1.5:1 ratio with respect to L; therefore, the formula for a physical pendulum as shewn in the video is:
T= 2π ((2/3)*(L/g))^(1/2)
NB: The mass (M) (because of its equal distribution in the phys. pend.) and the displacement angle (b) (too small to fall out of isochronism) are not necessary in this equation.
@@thomashughes4859 super, now try to solve my Physics Problem #4, ruclips.net/video/lAqd5qrFdYg/видео.html
Prof walter u are best teacher who show us path for our success
53:01
😊
I am really looking forward to watching ALL of your RUclips videos
Thank you so much profesor
Really this lecture help me to develop a deeply understanding ☺️☺️
It's my pleasure
Whow! I‘m down on my knees honoring horizontally swinging geniuses here ❤️ what a teacher
I am a 7th grade student , Your lecture makes me a passionate lover of physics Thank you sir for making a very complex subject like physics so easier for us 🙏🙏
Sir you are a man of culture since you use the metrics system
That was the most understandable and fun physics lecture I have ever taken.
Brilliant lecture.
I am an electronic/electrical engineer with a PhD in acoustics, that has loved physics - particularly astrophysics - for years.
I am by no means an expert, but I have managed to (whether it be accidentally or not) find myself correct in many debates with those - including astrophysicists - that are smarter and/or more respected/educated than me.
I remember proposing the anti-photon as a reason for the double slit experiment, getting laughed at in university for it, but then being asked to come back and explain how it might work.
But, over the years, as I have followed physics - particularly astrophysics - I have an uncertainly about some aspects of conservation of energy.
Namely the claim that energy can't be created or destroyed.
As such, I have come to the conclusion that - if modern day astrophysics is to believed;
A) Energy can be created or destroyed; and it doesn't only change from one form to another.
B) Energy conservation only is local.
Examples within the universe where energy is created/destroyed, are as follows . . .
Evaporating black holes are one, and the decaying cosmic microwave background is another.
Where is the heat energy from the latter (the decaying cosmic microwave background) going; if not being destroyed?
Also, where is the information, heat, and other energy from the former going; if not being destroyed?
I think sir Walter Lewin is the toolsy to make physics more enjoyable to people.He has proved that 'Physics' is not a simple word . It's a dream , it's a reality.Thanks a lot for spreading the love of physics
ruclips.net/user/shortsesyw1xihCWk
Professor I am from country called NEPAL and I am just at 9th stander though I understand your all videos. You really explain in very simple and realistic way.
Heartly
thanks professor
:)
At 10:47 I think the Reason why your Grandmother was right is hidden in Gravity
When we are Vertical Sir our neck muscles stiffen hence shorter
And when we are horizontal our muscles relax and no unnecessary strain on muscles so they can relax hence longer...
It is like the spring under weight and spring lying horizontally
This lecture was not just a regular one, it is more of an exhibition and the one who on stage to perform it was our great lecturer of all time.
Thank you sir Lewin for having show me the beauty of physics again after so long… ❤❤
Hope you still doing well.
you are welcome
The shortest lecture I have ever attented to.I am a student. Love from India .
I am a jee aspirant from india , I would like to bow down to you professor 🤗 for your practical visualisation of concepts that help me a lot in a deeper understanding of physics ...❤️ Again thankyou sir ❤️
So nice of you
THE STUDENT THERE ARE ACTUALLY LUCKY......PHYSICS WORKS 100 PERCENT CORRECT SIR....I AM LOVING PHYSICS ONLY BECOZ OFYOU SIR...,,,TEACHERS LIKE YOU WAS VERY RARE NOWADYS SIR ..IN THIS GENERATION TEACHERS ARE JUST TEACHING FOR NAME SAKE...BUT YOU OPENED MY EYES IN THE WAY I SAW THE PHYSICS.....LONG LIVE WALTER LEWIN ....SIR
Thank you Professor. You are making physics great again.
I'm a mathematics major, but you're really making me consider switching to physics.
+magicmike1122 Think very carefully before you make that decision.
@@lecturesbywalterlewin.they9259 Yeah you are right sir
We are very lucky to watch your video lectures... Thank you sir 😊
♥️♥️♥️
Ambition becomes stronger day by day .I wish I could do your live class:-
Sir well, I am from India but feeling love with your videos and obviously watching this video nearly after 5 years ..................................................
you are the best lecturer given by MIT
I’ve learnt much from you and the discussions, you’ve done! Thank you!
Glad to hear it!
what a good teacher the world has !!
Your lecture inspired me the most for being practical..
YOU ARE MY IDEAL SIR
Thanks a lot Sir.
Your lectures are just amazing.
God Bless You.
Keep enlightening us with you knowledge.
Flabbergasted to watch you teaching in such a fantastic way.....Thank You Sir🙏❤️
Another amazing lecture...uncertainties are taught in GCE a level...Thank you!
thats what i was going to comment haha... did you finish your cie exams?
Hello professor .
In the experiment with Tiffany at 10:27 we got the Horizontal length to be shorter than vertical.. But in theory it say that the Vertical length must be shorter.. And I wanted to end saying your lectures have made a huge impact in my life where it's hard to afford education ..By your help i try to learn all I can . I am very grateful for that ..
Thank you
I am a history student , but nowadays I watched some of your videos and it made me intrested in physics, so in my 5th semester I opted Astronomy and astrophysics as my opencourse subject
super
the pinnacle of fun physics lectures:)
Wonderful concept made me love of Physics. Thank U sir ❤️
My pleasure
Prof has a very good sense of humour. 😅
I am a doctor, but I watch your every lectures which have no relation with my Job. The more I watch your videos, I regret making my career in physics.
We need more professors like him...
Best Teacher (sir) walter lewin sir you are such a genius person ❤
I just found you!
Through I have heard about you!
Glad to know About your lecture
You are inspiring person ☺️
Thank you so much!
Now I realized that my biology sir was coping your teaching skills...
Really I have never seen such teacher❤️
I just fall in love with physics today 😊😊
it's never too late to fall in love
@@lecturesbywalterlewin.they9259 when did you fall
Lots of love sir.... 🙏
I am a physics teacher from INDIA🇮🇳
Sir u are very great teacher and I love physics because of you
May God bless you Pro. Lewin, You are memorable❤️❤️❤️
There was so much more I wanted to tell you when I had the opportunity to meet you last July. I was very fortunate to take physics in high school... We did go over error! Many of the experiments you perform in 8.01 we did in high school lab :)
did we meet in Cambridge and did I make a video of our meeting?
thanx for reminding me
@@lecturesbywalterlewin.they9259 I hope you're safe during this time. My heart goes out to any directly affected by this pandemic... I've been in self-quarantine for about a month here on Long Island and am looking forward to a time when I can resume my trips to Cambridge... I'm sure we all are looking forward to a return to normalcy...
By seeing your lecture i am deeply love the physics and i want to be a physicist.If i want then i will❤️.Thanks my god of physics, love u sir
Your lectures are amazing , it make me love physics even more
One day I would like to meet you sir .
A true legend for physics❤
Thank you for your wonderful lectures, but I was wondering if you have any videos on gravitational fields and their corresponding graphs.
You can find many on the web
"inches and feets drive me nuts!" -well said
Well, this man was born in the Netherlands (yes, in Yurp, next to Germany) in 1936 and around 1965 he started working at MIT. So he grew up without inches and feet! I am Dutch too, I know the problem. The rest of the world is in love with inches, feet, stones, two tastes of miles, Fahrenheit and whatever. I can not get used to these strange numbers and I don't want to know what Fahrenheit was thinking. The only one scale more bizar is Delisle. The higher the number, the colder it is. Yes, an inverted scale. Great.
Of course we understand and if needed we get used to your units soon enough, but a scientist must get tired of all those conversions before and after the actual calculations. Or he must use different constants for the oldfashioned units, which is just as annoying. Tradition is okay, but it has toooo many drawbacks.
A funny example was a giant hot air balloon, a Frisian cow. Drawing was in centimeters, and it was produced in the UK, in inches. That's a whole lot of volume more than expected. So, the balloon pilot said no thanks, and in the end somebody else bought it and installed a very large basket. This is a true story and there have been more cases of confusion just like this one. Awkward. So, thumbs and forearms and feet and stones, funny, but no thank you. No hard feelings, people start argueing about such things, viewers of this video know better. It is the way it is. At least I hope you liked the giant flying cow!
🥺💬 Very nice example as he told angular velocity concerns as external force.
🥺💬 He is correct Energy conservation, if no additional force applying then it cannot change direction or target height.
Sir if a body through upward from any height then how shall we define the equation of height?
you are free to use where y=0, if you throw it from y=-8 at time t=0 then y=-8 when t=0
great teacher
prof.waler lewin
Maybe the aluminium bar *does* become shorter (for some definition of "shorter") when it is upright. But, because the measuring tape is subject to a similar effect when that itself is upright too, you would not be able to tell locally. I'd think you need an outside observer at the very least... it's getting complicated fast :D
57:00 most amazing part perfect
Perfect experiment same trying but not yet
People find it unbelievable that when released from a stationary position a weight dropping vertically and a pendulum covering the same loss in height would emerge with the same final speed , and yet the distances covered and the time taken are different. Would need some elaborate equipment to show all this while using the pendulum to cover larger angle of swings rather than the approximation at smaller angles.
+Carmel Pule' Gravity is the ONLY force that does work when we drop an object or when we swing a pendulum. Since work is the dot product between the force and the displacement, in both cases you find that all that matter is the vertical distance that the objects travel. If we drop an objects from the same height from which we drop the pendulum the dropped object will have a higher speed as it hits the floor than the pendulum at its lowest point as the vertical distance displacement of the dropped object is larger. KE=mgh. thus the speed is sqrt(2gh).
You are the legend sir 🙏🏼🙏🏼🙏🏼🙏🏼
The second Einstein of the world. 👨🔬
i am a jee aspirant and i love your lectures sir ❤❤
Hello sir, I am the very big fan of physics & also yours WALTER LEWIN sir, i think you are the 2nd NEWTON
Wow, thanks
I think you are God in real life for students ❤️❤️❤️
TKS from Brazil you are great
Lots of love from India 🇮🇳
oh my i love MIT and Dr. W Lewis he has made me understand this topic and am going to help some people in physics dpt
😍I'm a high school student , i used think Physics is boring but after seeing ur lectures it made me super interested in physics .
❤❤❤❤
Happy to hear that!
@@lecturesbywalterlewin.they9259 hear or read sir
@@devavratabhisma1170 lol
An amazing professor!
I'm from Sri Lanka.thank u very much sir❤❤❤❤❤❤❤
Great sir the way you teach is so good . Stay bless
Sir what if we make feather and ball fall simultaneously in vacuum as there’ll be no air and thus no air drag
I recall once reading that early attempts to address weight vs acceleration of falling was done by experiments with balls rolling down inclines rather than objects dropped from heights. Is that correct? If it is, I wonder whether they would have come across the 'hollow vs solid" phenomenon of cylinder rolling you talk about in another lecture, and if the physics of that time was able to explain that phenomenon. If they could not, do you know from history about when the further discoveries about angular kinetics were made? Thanks.
>>> Is that correct?>>>
I don't know
use google, this goes back to the 17th century
Hi Prof. Great video. Please can you explain at 22:00 why it doesn't take 6 times longer or 6 times slower when the object is dropped on the moon.
drop (start zero speed) object on Earth from H meter above the ground.
H=0.5gt^2 t= (H/(g*0.5))^0.5
g on the moon is 6 times lower than on Earth.
Thus t will be sqrt(6) times larger on the moon.
@@lecturesbywalterlewin.they9259 Thanks. So final speed on moon Vm = Ve/(6^0.5)
@@birdman4274correct
@@lecturesbywalterlewin.they9259
Could I just ask one more clarification.
Acceleration is due to a change in speed but is also due to a change in direction i.e. if I am driving at constant speed in a straight line and suddenly turn to avoid a collision, I will experience a force due to a change in direction i.e the direction component of the velocity vector, since I maintained the same speed (magnitude). And is the acceleration the rate of change of direction as it would be with rate of change of speed? Thanks again
@@birdman4274 the speeds of circular motions of satellites and panets donot change. But the centripetal acc is v^2/R
Sir u r a great physicist and professor
Sir
Can you deeply explain me ?
Why does gravitational force is attractive ?
What is reason behind this attraction between two objects ?
I tried many times know about the real reason of this attraction at quantum level but i could not know .
Please explain me
Take a course in Einstein's Theory of GR. He explains it.
But I loved much more the gyroscope and angular momentum lessons. Yesss those are fantastic. THANK YOU PROF.
Good to see other Professors in the audience, getting some teaching tips
maybe ? Or just for the entertainment I think. Is that Professor Edmund Bertschinger
in the front row ?
Very entertaining and refreshing, thank you.
yes Ed Bertschinger was also in my audience.