@@lecturesbywalterlewin.they9259 Sir, what is the speed of ball as soon as a ball is given a impulse, ( I mean as the impulse touches the ball ) please reply sir 🙏
3 hours spent watching your lectures and it has taught me more than 3 years in high school, I really wish I'll be able to get in a university with a professor like you some day !
Surreal, it has been two decades since I studied this, and life has nothing to do with this (i mean it obviously has at everything is physics), i still follow these lectures ... i feel these lectures keep my mind sharp and improve my cognitive ability and to think beyond .. believe me this has helped me in my career though i have no use of physics in my professional life. And to be honest..what a gem of an academician prof Lewis is ... have been following his content since years .... some people are problem solvers, some 'know' the concepts quite clear .. but Prof Lewin "feels" the physics ..and its heat and soul ... true sign of greatness Dear Prof Lewin ..your name shall live as long as life exists on this Earth .. there was never a better Physics teacher ... respect from India
Professor Lewin - I had been having a very hard time in my first physics course until I came across your lectures. I don't know how you do it, but you make things MAKE SENSE in a way that I have never seen before! The difference in how I approach problem solving and, consequently, perform on tests is night and day. I went from dreading physics to dare I say....enjoying it? Being excited about it?! Getting A's in it?! Thank you for inspiring this "lightbulb moment" in myself and in many others!!
They "taught" us all this stuff in high school. Physics is my favorite subject (even though I'm in med school now). Teaching in the sense, making us mug up the formulae and do the math. But I personally took my time to go through my physics textbooks to develop a full understanding of the world and it really paid off. I wish they taught physics in a more sensible way. Thank you for these lectures so much, makes me remember the pages and illustrations in my physics notes from high school, while I still keep leaning new stuff from these! :D
It's quite amazing having an opportunity to see videos lectures of very knotty concepts in physics done by a world-class professor.I found these videos quite intriguing.Well done and God bless!
Walter, I stumbled upon your channel because I saw the video where you risked your life. I was very interested after watching that video on what kinds of things you do on your channel. Now, I've watched 3 of your lectures and I've loved all of them. I'm only 14 and have never really been into psychics but now I am. Thank you.
I am 22 now! I attended physics classes when I was 18 but didn't get to know the concepts well! But here I am again learning physics again with a simple curiosity of "Why certain things happen" and I am liking it thanks to your lectures Sir!
I'm really enjoying this. I took 8.01 in 1969 as a freshman. This brings back memories. The demos have gotten much better. Thanks for making these great lectures available. I also watched all of the 6.002 lectures. Glad that I can still follow the math.
@@turtle8558 For beginner like me, this lecture was more easy and easy to understand, feynman's lecture is great because it inspires me to study this subject with his analogy, but this lecture with demonstration is great on its own way
I really enjoy the way that you use students eyeballing the demonstrations as a way to get them to intuitively understand the importance of error. It's a great teaching technique.
Thank you so much Prof. Lewin. I've never even imagined that physics could be so sublime and perfect. I wish you live for a few more decades. I wish the lecture lasted longer.
His love and passion for physics is so contagious. Given that there are literally thousands of physics lectures widely available on all kinds of platforms online, I think it really speaks to Professor Lewin that this series truly remains one of-if not THE-best out there. It's like he installs the intuition into your brain all without you even realizing it's happening. Never a dull moment, no dumbing down, brilliant clarity and coherence. My gratitude for this free lecture series cannot be overstated.
I am watching each lecture in order...even taking notes for myself to learn physics from a true master. I realize I may be late to the party, but Dr. Lewin, THANK YOU for helping me to love physics even more than ever. I wish you all the best in love and health always.
Mr. Lewin,you are a really different person. I think, there isn't anyone like you in the world. You are teaching in a very enjoyable way. You do experiments, demonstrations, tell interesting stories, and even comic and entertaining activities during the lectures.And all of them enjoys the students, makes them love physics and science. And they are starting to being interested in physics. You are educarting the whole world. Making us love physics and see the beauty of it.And you are telling the ideas very very understandably. We can understand the concepts from you very well and easily. WHO ELSE DO IT? IS THERE ANOTHER PROFESSOR WHO MAKES THE SAME?. God bless you. I am prey for you. You are the professor of all of the world and Who wants to really understand physics and see the beauty of the universe!! THANK YOU SO SO SO MUCH!!!!
@@lecturesbywalterlewin.they9259 Oh, my Godness. You are still making good and educational videos. And you're replying the comments as well.This is also a very good and rare thing. Thank you for replying our comments and questions.
I've been watching all of your lectures, and all of them are just BEAUTIFUL, there are no words to demonstrate how nice it is, when I become a teacher, I wanna be like you!!
legendary lecture im sitting in my university for 3 hours a week and learn nothing here in 50 min i can learn it and doing it in style :D well done sir walter
Bestest lecture on Physics (in Kinematics), I have ever seen in my life..!!! Respected Walter Lewin Sir you are Great, simply amazing..!!!💯💯 I am 16 years old JEE Apsirant from India, your lectures give me the realistic feel, of what is taught in books..!!! Sir please read my comment and if possible please reply, It will make my day..!! 🙏🙏❤❤❤
You gave this lecture in 1999.. And I came in 2001( before I born already you did😌) ! And I am very happy to get an opportunity to watch your lectures.. thank you professor...lots of love for you.♥️.. your lectures are amazing...I am in love with your lectures...
I've had to suspend my university education due to COVID, but your lectures scratch that academic itch so good. I'm not a physics major, but I've learned so much already. Thank you for helping me continue to learn about the world while trapped in my house.
Mr. Lewin you are the best teacher i've ever studies in youtube. Your way to teach is so easy to understand and the example each lesson make me more interested in with each equation. Now i'm 20 not too young i find out i love physic through each lect you tauaght. Wish you all the best. Hope i will see you in real life to say thanks with you❤🔥❤🔥❤🔥
these are not lectures these are beauty........ These are the best lecture ever made by any human being...... iam very lucky these lectures are recorded and iam witnessing their beauty i also thank today's technology
sir, i am a lover of physics.Through your lecture I learnt physics is a lot more simple and understandable. thanks for teaching .I guess i should mention it as a good service for physics lovers
It's literally the best physics lecture I've also ever seen. Thank you for existing sir, thank you for sharing your time, your knowledge and your passion!!! From Spain
Poor Monkey!😆😆 I have already covered 8.01 physics but i still watch your wonderful lectures for further insights into the subject. Great stuff. Thank you Professor Lewin.
Yes, poor monkey! I was so glad when I saw he had a bullet proof vest, so that he got to keep safer. I am enjoying these lectures so much. Perhaps I my physics lecturer did things like this, I may have remembered what we were taught.
Professor Lewin, I myself am a plasma physicist and currently a researcher in fusion energy. I just finished reading your book For the love of physics and wanted to revisit your lectures. I got to tell you, I wish the lectures I attended during my curriculum were half as engaging as yours! I may be moving to Massachusetts soon and I would honored if you would accept for me to pay you a visit!
sir i love physics and your lectures very much. but i dont have any mathematical background so it is causing some problems for me to understand some technical terms. Because of your lectures , even though i am a medical student, i still study physics and each time i see a new chapter i feel very enthusiastic. thank you very much professor. hats off.
The best topic discussed by the best teacher...Thankyou sir for enlightening us ....Your teaching style is incredible and.. that's true this channel makes you fall in ♥️ with Physics.
Happy birthday Walter lewin sir..believe it or not but any amounts of thank yous and appreciations will not do justice to your work and legacy..and the way you teach us physics …would have brought you a cake if I knew where you live 🥳🥳
You are so good teacher and even if I am young and or more likely that I wont get into MIT I can learn physics because I love it and your explanation is very funny and helpfull!
You, sir, are freaking amazing. I was going to say you were going too fast a pace (but then I remembered I watched your videos at double speed). I just wanted to learn physics because I'm a self-learned programmer, and I wanted to make lively simulations. Now, though, thanks to the quality of these well rehearsed lectures, I'm likely going to work at the 8.02 and 8.03 lectures as well. Physics allures me now. (:
I have never seen such a erudite, wit and best physics teacher in my life so far. Love your every leactures and demonstration.❤️❤️❤️❤️ Love from Nepal#paragon_of_physics_scholar_teacher_walterlewin
Sir thnk u for theses lectures , a person like me who didn't understand the concept and end up memorizing it but now I'll be able to feel it thnk u sir
@@lecturesbywalterlewin.they9259 Please show us the “16th Space” Art that you have mentioned in your book. I have been searching for it on the web but didn’t find any results.
To the question « why do we have V0² in the formula giving the highest point P » : same argument as for OS : the time of flight is proportional to the Y component of V0 [which is V0 sin(a)]. When V0 doubles, it’s Y and it’s X component both double. So the time of flight doubles. The speed along the Y axis Vy(t) diminishes in a linear way, proportional to the time elapsed since Vy(t) = -gt + V0. sin(a) As this reduction in Vy(t) is linear, if V0y doubles, then during each second of flight, the distance traveled along the Y axis also doubles. And so the height of P is multiplied by 4. Thanks for this very cool lecture ! Greetings from France
highest point 0 = -gt + V_oy Y= y_o + Vo_y*t - 0.5g*t^2 calculate t from eq 1 and substitute it in eq 2. you then know what the highest point (y_max) is.
Sure, I understand the math demonstration. I was trying, as you requested at 12:24, to "instinctively" understand why it makes sense to see Vo² in the formula giving the highest point P. It is clear to me why Vo² appears in the calculation of the total distance traveled along x : 1) Given that : - the time needed to reach the apex equals the time to fall from the apex to the ground - the time to reach the apex is Voy / g and that Voy doubles when Vo doubles then doubling Vo means doubling the time of flight. 2) Given that Vox doubles when Vo doubles, and that Vx is constant, during each second of flight the projectile will travel a double distance so when V0 is multiplied by 2, time of flight is multiplied by 2 AND speed along x is multiplied by 2, meaning that total distance traveled along x is multiplied by 4. I tried to apply the same reasoning for the y axis but this doesn't work because of the continous decrease of Vy.... So I understand the maths, but I dont get the "feeling" of why it makes sense to see Vo² in the formula giving the highest point P...
>>>>so when V0 is multiplied by 2, time of flight is multiplied by 2 AND speed along x is multiplied by 2, meaning that total distance traveled along x is multiplied by 4. >>>> NO the speed along the x-axis does not double, it is always V_ox; it can not change as there is no acceleration in that direction. If you need more help, please use Google or ask one of your class mates.
Very best physics lecture I have ever seen you are really very good Indian education system is bad there is only learning of theories and no practicals Or experiments
Hello sir, I am from india and i wanted to study in mit university but my family financial condition is not so good. I am in class 10 and i am preparing for international olympiad exam(ijso) , so that i gain some recognition and scholorships to study further. Sir so please tell me some ways for admission and studing without much fee in mit. And after that it will totally depend on my willing power, no matter how much time and effert will it take but i achieve it. Love you walter sir❤
The first time i saw a question like this i couldn't understand why the time is equal to both cases (with/out gravity) and then i went to a great teacher to ask why. He couldn't answer me because he was tired from helping other's students doubts on math, physics and chemistry and i forgot to ask him later about that problem. It's been about 6 months since that and i accidentally found your lactures and mainly this video, so thank you for your great explanation Walter. (Grettins from Brazil)
@@lecturesbywalterlewin.they9259 Thankyou sir , I really want to meet you because you are such a great physicist . I also wanted meet Stephen Hawking but he is no more . I always want to become an astrophysicist . Thankyou very much sir ❤️💙🧡💚💛
To think that he dropped the monkey and had to put it up again just for the sake of doing a joke and making the lecture more entertaining, it's incredible, I laughed a lot, and you can hardly say that about a physics lecture, truly an amazing professor, love your lectures, greetings from Brazil
By far the best physics lecture I've ever seen in my life.
:)
May be not there a lot of them
By HIM
You see him above
Same
@@lecturesbywalterlewin.they9259 :)
@@lecturesbywalterlewin.they9259 Sir,
what is the speed of ball as soon as a ball is given a impulse, ( I mean as the impulse touches the ball ) please reply sir 🙏
3 hours spent watching your lectures and it has taught me more than 3 years in high school, I really wish I'll be able to get in a university with a professor like you some day !
:)
Did you?
@@kelamullah1999maybe he did ?? just being positive here
@@roastedskeleton2358 Positive mental attitude
Then you haven't studied in your school🫣🤣🤣
Surreal, it has been two decades since I studied this, and life has nothing to do with this (i mean it obviously has at everything is physics), i still follow these lectures ... i feel these lectures keep my mind sharp and improve my cognitive ability and to think beyond .. believe me this has helped me in my career though i have no use of physics in my professional life.
And to be honest..what a gem of an academician prof Lewis is ... have been following his content since years .... some people are problem solvers, some 'know' the concepts quite clear .. but Prof Lewin "feels" the physics ..and its heat and soul ... true sign of greatness
Dear Prof Lewin ..your name shall live as long as life exists on this Earth .. there was never a better Physics teacher ... respect from India
Professor Lewin - I had been having a very hard time in my first physics course until I came across your lectures. I don't know how you do it, but you make things MAKE SENSE in a way that I have never seen before! The difference in how I approach problem solving and, consequently, perform on tests is night and day. I went from dreading physics to dare I say....enjoying it? Being excited about it?! Getting A's in it?! Thank you for inspiring this "lightbulb moment" in myself and in many others!!
Excellent!
They "taught" us all this stuff in high school. Physics is my favorite subject (even though I'm in med school now). Teaching in the sense, making us mug up the formulae and do the math. But I personally took my time to go through my physics textbooks to develop a full understanding of the world and it really paid off. I wish they taught physics in a more sensible way. Thank you for these lectures so much, makes me remember the pages and illustrations in my physics notes from high school, while I still keep leaning new stuff from these! :D
Which med school?
It's quite amazing having an opportunity to see videos lectures of very knotty concepts in physics done by a world-class professor.I found these videos quite intriguing.Well done and God bless!
+Ogunyomi Kehinde thank you
Your lectures deserve at least a billion views each! Thank you so much for sharing them, I wish you all the very best!
Walter, I stumbled upon your channel because I saw the video where you risked your life. I was very interested after watching that video on what kinds of things you do on your channel. Now, I've watched 3 of your lectures and I've loved all of them. I'm only 14 and have never really been into psychics but now I am. Thank you.
Welcome aboard!
I am 22 now! I attended physics classes when I was 18 but didn't get to know the concepts well! But here I am again learning physics again with a simple curiosity of "Why certain things happen" and I am liking it thanks to your lectures Sir!
I was down with typhoid and missed my classes. Watching this,makes me feels i never missed anything. Thank you so much. Walter sir. Thank you so much
I'm really enjoying this. I took 8.01 in 1969 as a freshman. This brings back memories. The demos have gotten much better. Thanks for making these great lectures available. I also watched all of the 6.002 lectures. Glad that I can still follow the math.
Glad you enjoyed it!
You are the *best physics teacher.* God bless you with a *long life.*
Feyman is still better
@@turtle8558 For beginner like me, this lecture was more easy and easy to understand, feynman's lecture is great because it inspires me to study this subject with his analogy, but this lecture with demonstration is great on its own way
This lecture was awesome on its own way😃
okkkkkkkkkkkkkkkkkkkkkkkkkkkk@@alimukhtar4759
I really enjoy the way that you use students eyeballing the demonstrations as a way to get them to intuitively understand the importance of error. It's a great teaching technique.
It was the best physics class I've ever seen. Experiments are a huge contribution to classes. Your way of teaching is amazing. Regards from Brazil.
Thank you so much Prof. Lewin. I've never even imagined that physics could be so sublime and perfect. I wish you live for a few more decades. I wish the lecture lasted longer.
This professor has attained otherworldly teaching skills. Kudos ! 💫
Mr. Walter Lewin
last 5 mins of ur lect are always jaw dropping :-)
:)
His love and passion for physics is so contagious. Given that there are literally thousands of physics lectures widely available on all kinds of platforms online, I think it really speaks to Professor Lewin that this series truly remains one of-if not THE-best out there. It's like he installs the intuition into your brain all without you even realizing it's happening. Never a dull moment, no dumbing down, brilliant clarity and coherence. My gratitude for this free lecture series cannot be overstated.
Thank you sir. You are the best Physics teacher I have ever come across.
Wow, thanks
I am watching each lecture in order...even taking notes for myself to learn physics from a true master. I realize I may be late to the party, but Dr. Lewin, THANK YOU for helping me to love physics even more than ever. I wish you all the best in love and health always.
Mr. Lewin,you are a really different person. I think, there isn't anyone like you in the world. You are teaching in a very enjoyable way. You do experiments, demonstrations, tell interesting stories, and even comic and entertaining activities during the lectures.And all of them enjoys the students, makes them love physics and science. And they are starting to being interested in physics. You are educarting the whole world. Making us love physics and see the beauty of it.And you are telling the ideas very very understandably. We can understand the concepts from you very well and easily. WHO ELSE DO IT? IS THERE ANOTHER PROFESSOR WHO MAKES THE SAME?. God bless you. I am prey for you. You are the professor of all of the world and Who wants to really understand physics and see the beauty of the universe!! THANK YOU SO SO SO MUCH!!!!
you are most welcome!
@@lecturesbywalterlewin.they9259 Oh, my Godness. You are still making good and educational videos. And you're replying the comments as well.This is also a very good and rare thing. Thank you for replying our comments and questions.
I've been watching all of your lectures, and all of them are just BEAUTIFUL, there are no words to demonstrate how nice it is, when I become a teacher, I wanna be like you!!
:)
legendary lecture im sitting in my university for 3 hours a week and learn nothing here in 50 min i can learn it and doing it in style :D well done sir walter
Watching you teach physics just makes me euphoric and giddy - I can't stop jumping around in my chair as you teach - you are the best
Bestest lecture on Physics (in Kinematics), I have ever seen in my life..!!! Respected Walter Lewin Sir you are Great, simply amazing..!!!💯💯 I am 16 years old JEE Apsirant from India, your lectures give me the realistic feel, of what is taught in books..!!! Sir please read my comment and if possible please reply, It will make my day..!! 🙏🙏❤❤❤
Same bro I am also 16 year old 2024 JEE aspirant and now watching all his lectures. did you crack JEE? any updates?
48:00
When I do it, I'd like to do it with style.
Amazing you are sir
Love from India
❤🇮🇳🇮🇳
🇮🇳🇮🇳❤
The one of the best physics teachers in of very few of gives very importance to intivitive understanding and real world knowledge
You gave this lecture in 1999..
And I came in 2001( before I born already you did😌) ! And I am very happy to get an opportunity to watch your lectures.. thank you professor...lots of love for you.♥️.. your lectures are amazing...I am in love with your lectures...
My physics teacher can't hold a candle, the way Walter explains the material makes it effortless to learn.
Never watched such a lecture with fun.
Thank you professor lewin and team to providing such a excellent content across globe.
Our pleasure!
freaking KING!! of physics, this guy makes learning physics so enjoyable. thanks a lot
:)
I've had to suspend my university education due to COVID, but your lectures scratch that academic itch so good. I'm not a physics major, but I've learned so much already. Thank you for helping me continue to learn about the world while trapped in my house.
51:38 just see his face.All that sacrifice for the love Of physics.
Mr. Lewin you are the best teacher i've ever studies in youtube. Your way to teach is so easy to understand and the example each lesson make me more interested in with each equation. Now i'm 20 not too young i find out i love physic through each lect you tauaght. Wish you all the best. Hope i will see you in real life to say thanks with you❤🔥❤🔥❤🔥
these are not lectures these are beauty........
These are the best lecture ever made by any human being......
iam very lucky these lectures are recorded and iam witnessing their beauty
i also thank today's technology
Your dedication and love towards teaching physics are always beyond anyone's expectations sir
It's VAMSHI here
LOVE FROM INDIA TO YOU SIR
sir, i am a lover of physics.Through your lecture I learnt physics is a lot more simple and understandable. thanks for teaching .I guess i should mention it as a good service for physics lovers
I am just out of any words...
I can't believe that and I have never thought I would be so blessed to see such a great lecture on TH-cam.
Loved it...
🌝
It's literally the best physics lecture I've also ever seen. Thank you for existing sir, thank you for sharing your time, your knowledge and your passion!!! From Spain
You are most welcome
'Boo man.' :D
This lecture was even more awesome that the other lectures that I have seen till now. :D
+Jonty Roy super! Make sure you do not miss the Geminides - meteor shower tonight (Dec 13=>14) and for about 4 more days.
I'm a Comp Sci major who had no background in physics when I started college. These videos helped save me. Great job!
These lectures are no less than big budget movies...and the only hero here is YOU "sir"❤️
I fell in love with physics seeing your lectures ,Thanks a lot sir
Poor Monkey!😆😆
I have already covered 8.01 physics but i still watch your wonderful lectures for further insights into the subject. Great stuff.
Thank you Professor Lewin.
Yes, poor monkey! I was so glad when I saw he had a bullet proof vest, so that he got to keep safer.
I am enjoying these lectures so much. Perhaps I my physics lecturer did things like this, I may have remembered what we were taught.
This is a master teacher lecturing while conserving energy with a sore throat.
Professor Lewin, I myself am a plasma physicist and currently a researcher in fusion energy. I just finished reading your book For the love of physics and wanted to revisit your lectures. I got to tell you, I wish the lectures I attended during my curriculum were half as engaging as yours! I may be moving to Massachusetts soon and I would honored if you would accept for me to pay you a visit!
Thank you, Walter Lewin, for sending the elevator back down. These videos are informative, inspiring and perspective shaping.
the first ever physics in my life in which I was actually happy and smiling while watching .... thank you sir ...
sir i love physics and your lectures very much. but i dont have any mathematical background so it is causing some problems for me to understand some technical terms. Because of your lectures , even though i am a medical student, i still study physics and each time i see a new chapter i feel very enthusiastic. thank you very much professor. hats off.
Mit opencourseware has an amazing course on calculus and linear algebra, you should sit through them, since medical students need mathematics !
Look up Professor Leonard's channel.
@Michael Steshenko I think you should reread your comment(fourth word).
This was the best lecture,
Robert really made the lecture mind-blowing
the best physics teacher i've ever seen my life...............i read your book "for the love of physics"
Love from India sir...your teaching methods are awesome. India respects your knowledge. ♥️🙂
So nice of you
Great lectures Prof. really your teaching technic is truely inspirational. Thanks for doing such a great work in Physics. I truely obliged.
I must say sr u r an IDEAL teacher ,who REALLY exist
The best topic discussed by the best teacher...Thankyou sir for enlightening us ....Your teaching style is incredible and.. that's true this channel makes you fall in ♥️ with Physics.
Happy birthday Walter lewin sir..believe it or not but any amounts of thank yous and appreciations will not do justice to your work and legacy..and the way you teach us physics …would have brought you a cake if I knew where you live 🥳🥳
I m not student of physics but love to watch ur videos love u sir long live healthy life from 🇵🇰
I AM INDIAN STUDENTS 👍 YOUR TEACHING STYLE ARE AMAZING 😎
That boy is the luckiest person in the word to get the chance to stand with "SIR"!!!
You are so good teacher and even if I am young and or more likely that I wont get into MIT I can learn physics because I love it and your explanation is very funny and helpfull!
Thanks for your kind words
What a pleasing example with the monkey! Was so interesting to watch, and not only that - everything!
Best teacher ever and good job Robert!
Bravo, professor! Bravo! Dank je wel, from a brazilian admirer of your work and dedication. Hope you are well and happy, and stay so for a long time.
Sir this type content never seen by me wow complete concept clear no one like u
You, sir, are freaking amazing. I was going to say you were going too fast a pace (but then I remembered I watched your videos at double speed).
I just wanted to learn physics because I'm a self-learned programmer, and I wanted to make lively simulations. Now, though, thanks to the quality of these well rehearsed lectures, I'm likely going to work at the 8.02 and 8.03 lectures as well. Physics allures me now. (:
:)
I have never seen such a erudite, wit and best physics teacher in my life so far. Love your every leactures and demonstration.❤️❤️❤️❤️ Love from Nepal#paragon_of_physics_scholar_teacher_walterlewin
Professor..! You are awesome. This lecture is very interesting.
:)
Earlier i studied physics and all was darkness
Then TH-cam said, let there be Walter Lewin
And all was light.
Thank you so much for this sir 😍
You are the best lecturer I have seen till date
Wooooooow. So incredible. I am in love with your lectures. Thank you.
:)
These Lectures helped me Alot in My Medical entrance preparation.. thank you So much Sir😄 .. Love from India ❤️
How did you do in your exam?
This is the best lecture i have ever studied on this topic sir
You really make every student to love physics... Love you sir... Long live
Lewin sir is the best physics teacher"My inspiration"
Today I googled, "Best physics teacher in the world" and you know what, Your picture, hanging from the pendulum came up. You are just amazing.
:)
rip Robert your contributions to science will not be forgotten
The only teacher I respect from heart 💘❤️
Sir thnk u for theses lectures , a person like me who didn't understand the concept and end up memorizing it but now I'll be able to feel it thnk u sir
I was already in love with Physics
Now we are engaged
Never felt so good in life, i want a environment like this to study
Sir I had almost lost interest in physics but thanks to you and youtube(who recommended me this video) that I am able to do my physics wells!😄
Excellent
@@lecturesbywalterlewin.they9259 Please show us the “16th Space” Art that you have mentioned in your book. I have been searching for it on the web but didn’t find any results.
To the question « why do we have V0² in the formula giving the highest point P » : same argument as for OS : the time of flight is proportional to the Y component of V0 [which is V0 sin(a)].
When V0 doubles, it’s Y and it’s X component both double. So the time of flight doubles.
The speed along the Y axis Vy(t) diminishes in a linear way, proportional to the time elapsed since Vy(t) = -gt + V0. sin(a)
As this reduction in Vy(t) is linear, if V0y doubles, then during each second of flight, the distance traveled along the Y axis also doubles.
And so the height of P is multiplied by 4.
Thanks for this very cool lecture !
Greetings from France
highest point 0 = -gt + V_oy
Y= y_o + Vo_y*t - 0.5g*t^2
calculate t from eq 1 and substitute it in eq 2. you then know what the highest point (y_max) is.
the distance traveled in x when the object hits the ground is V_ox*2t. t here is the time it reaches its highest point
yep, I do understand this
Sure, I understand the math demonstration. I was trying, as you requested at 12:24, to "instinctively" understand why it makes sense to see Vo² in the formula giving the highest point P. It is clear to me why Vo² appears in the calculation of the total distance traveled along x :
1) Given that :
- the time needed to reach the apex equals the time to fall from the apex to the ground
- the time to reach the apex is Voy / g and that Voy doubles when Vo doubles
then doubling Vo means doubling the time of flight.
2) Given that Vox doubles when Vo doubles, and that Vx is constant, during each second of flight the projectile will travel a double distance
so when V0 is multiplied by 2, time of flight is multiplied by 2 AND speed along x is multiplied by 2, meaning that total distance traveled along x is multiplied by 4.
I tried to apply the same reasoning for the y axis but this doesn't work because of the continous decrease of Vy....
So I understand the maths, but I dont get the "feeling" of why it makes sense to see Vo² in the formula giving the highest point P...
>>>>so when V0 is multiplied by 2, time of flight is multiplied by 2 AND speed along x is multiplied by 2, meaning that total distance traveled along x is multiplied by 4. >>>>
NO the speed along the x-axis does not double, it is always V_ox; it can not change as there is no acceleration in that direction. If you need more help, please use Google or ask one of your class mates.
Very best physics lecture I have ever seen you are really very good
Indian education system is bad there is only learning of theories and no practicals Or experiments
Hello sir, I am from india and i wanted to study in mit university but my family financial condition is not so good. I am in class 10 and i am preparing for international olympiad exam(ijso) , so that i gain some recognition and scholorships to study further. Sir so please tell me some ways for admission and studing without much fee in mit.
And after that it will totally depend on my willing power, no matter how much time and effert will it take but i achieve it.
Love you walter sir❤
if you are truly brilliant, MIT will offer your fellowships, cash and a job *which will pay for all your expenses*
The first time i saw a question like this i couldn't understand why the time is equal to both cases (with/out gravity) and then i went to a great teacher to ask why. He couldn't answer me because he was tired from helping other's students doubts on math, physics and chemistry and i forgot to ask him later about that problem. It's been about 6 months since that and i accidentally found your lactures and mainly this video, so thank you for your great explanation Walter. (Grettins from Brazil)
You are very welcome!
I haven't even smiled in any physics lesson in my entire life. But in Lewin's lecture, I can't even stop laughing throughout the whole class.
Hats off..... One of the best lectures I have ever had....
The definition of the Greatest of all time
Amazing. Huge respect from India.
Best lecturer of physics!!!!!
#WalterLewinSir
#LovefromIndia😀😀😀
I wish i will meet with him oneday...
Sir , I am in class 9th so this could be a bouncer from me but just listening to it , I got it !
Great!
@@lecturesbywalterlewin.they9259 Thankyou sir , I really want to meet you because you are such a great physicist . I also wanted meet Stephen Hawking but he is no more . I always want to become an astrophysicist . Thankyou very much sir ❤️💙🧡💚💛
To think that he dropped the monkey and had to put it up again just for the sake of doing a joke and making the lecture more entertaining, it's incredible, I laughed a lot, and you can hardly say that about a physics lecture, truly an amazing professor, love your lectures, greetings from Brazil
I think he was making lecture enjoyable and also testing whether the monkey falling switch mechanism is working properly....
Sir you are my inspiration...I love you so much sir... may I God bless you.
I miss you so much. God bless you.
Awesome man it just increase interest and respect towards physics.thanks sir.can you give us notes it will be useful
Your lectures are really great sir... Physics is so interesting, this fact i came to know from you....dreaming to see you sir
All the best
This monkey thing is probably the best context i went through
The more interesting...all the calculations theories are true all over the world! :-)
One of the best videos on projectile motion :)