8.01x - Lect 24 - Rolling Motion, Gyroscopes, VERY NON-INTUITIVE

[@DiarmuidKeaney]

This is exactly how physics should be taught in schools and college. Theory-Practical Demo and understanding of the application. Well done Walter Lewin, I love your passion for your subject.

[@lecturesbywalterlewin.they9259]

:)

[@sowmyag5142]

Yeah

[@xavierpoes4985]

WanderAbroad I beg to disagree. there are many theories for which there is not, or at least for some time there wasn't, a clear application. This doesn't make them useless.

[@bashisobsolete.pythonismyn6321]

@WanderAbroad i am british. educated britons know all about history and politics. that's why we are a nuclear power with satellites in orbit that can see into the earth and show us where the minerals are. that's why our diplomats have fingers in all the pies. that's why we control oil in Nigeria and gold in Ghana. that's why South Africa is ours (soon). no revolutions or great depressions setting us back. British American Tobacco. Anglo Dutch Oil. Lloyd's. BAE Systems. East India Company. Professor Lewin knows all about history and politics. that's why he was a top-level academic with tenure.

[@cemasti4524]

If I design another way of teaching the same concepts in physics u would fall of ur chair. Hint; in my teaching method no classroom no sitting no instructor or very little of it. All action.

[@richmac918]

This has to be one of the most passionate professors I've ever seen. Those who have the opportunity to learn from him are lucky.

[@phoenus]

we are all lucky!

[@Arty_Zik]

Yo

[@danigarrablanca]

He is not a professor, he is a MASTER

[@saadhassan8813]

Technology has made all of lucky

[@uluhitah12]

we are all lucky, because we can watch his lesson from KZbin.

[@frankservant5754]

How can one not LOVE Physics when taught by such a man!!

[@lecturesbywalterlewin.they9259]

:)

[@javierlopezkalder3576]

Lectures by Walter Lewin. They will make you ♥ Physics. Can I send you an Email?

[@lecturesbywalterlewin.they9259]

my email is strictly private.

[@javierlopezkalder3576]

Lectures by Walter Lewin. They will make you ♥ Physics. I Would Like to purchase your full collection of videos and writes.

[@lecturesbywalterlewin.they9259]

I have DVDs of all my lectures. I have only 1 copy of each lecture. I'd be willing to sell to you all my personal 36 videos of my course 8.01 for $7000. New copies can no longer be made. My extensive notes for each lecture - with time marks - are not for sale. I can send you a signed copy of my book for $30 + postage. Postage is $10 in the US, $30 to Europe and $48 to India. I will write a special note for you in the book. I will also include a signed colored picture of me swinging on the pendulum (with your name written on it). For an additional $25 (+ postage) I will send you a signed and dated 24x18 inch sheet of paper with my original handwritten calculations as I post on my Bi-Weekly Physic Problems. I will send you 2 such sheets for $35 (+postage). They are the originals - *thus one of a kind - there are NO copies.* You can see 3 such sheets in the video in which I solved the yo-yo problem of 2 weeks ago: kzbin.info/www/bejne/q3KyhH6hmburmc0 When you transfer the money to my PayPal account let me know your full name and your address (make sure it is correct and complete). Keep in mind that PayPal charges 6% for each transition. PayPal: [e-mail]

[@lorcankelleher5434]

I have been studying engineering for 6 years. No one has ever explained dynamics in such a tangible way to me. Thank you.

[@lecturesbywalterlewin.they9259]

Great to hear!

[@-leelakrishnan1970]

I had a craze to enter IIT,but it was a difficult task to crack the entrance test at that time.There were several ifs and buts.Now in this digital world,everything you get at the click of a button The lectures of the greats like professor Lewin, you could not imagine in the past.Long live the professor so that we could here more about physics.

[@kumargulshan1543]

​@@-leelakrishnan1970what are you doing now bro

[@rapskallion]

A pleasure to watch this man's emotions. He loves to teach.

[@SpaceMissile]

"i only have to act enthusiastic one time, film it, and then play the lesson to next year's class."

[@davidgillon6187]

Great!

[@margodphd]

I usually don't believe promises made by channels - but this one indeed made me love physics EVEN more. Thank You, professor, for allowing us all to have access to these wonderful lecturers, for free, worldwide. Equalising access to education is an important humanitarian effort.

[@2pointSummer]

I remember this at my first year of technical mechanics course.. it was the most enjoyable class I have ever taken and this takes me back. thank you Walter Lewin for sharing your lectures with us.

[@ramyhuber8392]

Always so wonderful to have an excellent, passionate teacher!

[@AhmetD..]

35:30 - 39:13 : Such an amazing lecture.

[@FATH3RoO]

mind blown

[@HarmonicaMustang]

THIS is why I love university lectures on any subject; the lecturers are passionate for their subject, they're experts in their field, and will not hesitate to throw a pen at a disruptive student. I've still got my notebooks full of hand-written notes and diagrams from my studies at uni, I treat them like the golden essence of knowledge they are. I've got plenty of academic books that go more in-depth on various practises, but I still refer back to my notes simply because they contain the significant key points. Lately I needed to learn something I didn't do at uni that's related to my field, and once I got a better understanding I even turned to some fresh pages in these notebooks and made further notes. I need to photocopy them and archive them as a PDF because losing them would be a great loss.

[@lucadellasciucca967]

Did you make the PDF? pls do!

[@Arctodusangustidens]

I loved your lecture, I am a 50 years old biologist and I am planing to see all of them! you are an awesome teacher! Thank you

[@Mhvhsraa]

❤❤❤

[@dw734]

At the end of the lecture I wanted to give him an applause. The man is an legend among teachers.

[@BrienCoffield]

If I would've had a physics professor like this, my profession would likely have been different. What an incredible lecture. This is what teaching should be.

[@callmeandoru2627]

for the first time ever in life I understand Gyroscopes. Thanks Walter Lewin so much. you are the one Physics teacher that everyone in this world need

[@markpointer2967]

Hello Sir! I graduated with an MSc in Applied Physics from a highly regarded university here in the UK (unfortunately, no, I didn’t make it to Oxford / Cambridge! I would have tried harder, had I known. But then, isn’t hindsight a wonderful thing??!), a number of years ago. For various reasons (and again, I would go back and change things if I could), I have never since worked in physics, or science, though I keep a keen interest. However, your lectures are just fabulous, and I think I’ve watched all - or nearly all - of them. They have re kindled my interest, and my knowledge, which had turned very rusty! They make superb viewing, on many levels, and thanks to your online lectures, I’m now actively looking at returning formally to the subject. I have not decided on the exact route or goal of mine, but if I hadn’t come across your lectures, it would never have gotten the ball rolling. And, yes, I believe it is a Perfect Roll! :-) Thank you again Sir! M.P.

[@Intwademala]

Look up "Power Ball Hand Exerciser". Its a dual axis Gyro that is powered with a simple flick of the wrist. Try and put coils and magnets in it to make a hand held power generator.

[@wanderingbardess]

His book” for the love of physics “created interest in me for physics. Genius and true teacher of our time

[@edwardjacklewis]

... the unchanging nature of the knowledge does not make this lecture out if date!

[@johnbrevard5966]

He isn't teaching. He is Purely making the minds Think and Absorb. Bravo for the amazing Info and Enthusiasm

[@OSVSL]

You shouldn't smoke weed and do homework because next thing you know you watch a whole lecture about physics and you don't even have a physics class.

[@KyroMania]

and i was about to go to bed

[@dfuma213]

O S V S L bro I’m high as well watching this while procrastinating for homework what the hell lmao

[@krepkygrimes5002]

O S V S L Heh heh heh.

[@J__C__]

What u mean? I'm not even in school! 🤣🤙

[@reymartinez2242]

It doesnt mater is you smoke weed, Mr. Lewin has captured your attention. In the society we we live in now. Its nice to see a true hero, someone who loves learning and education. I smoke weed, and I find myself being inspired by Mr. Lewin. 1.8 million views. Thank you kind sir.

[@astroplutonium]

I love his lectures, every time i say 5 minutes just to see what it is, i am stuck for an hour...

[@prakashbokati7392]

If there were a Nobel Prize for Best Teacher, I'm sure you would get it! Thank you for being such an amazing person and true inspiration! Thanks from Nepal!

[@lecturesbywalterlewin.they9259]

:) :)

[@billyjack8119]

40:25 i did that when i was 10 years old. Not sure why but it was fun at the time. I used to take ice cream buckets with a funnel stuck through with a hose on the other end. Fill the funnel with flour with a lit candle beside it and snap the lid on and blow. Nice flour explosion. Ya 40 years later and all i do is go to work so my kids can sit in classes like this. Well keep up the good work A+

[@tonybrowneyed8277]

the physics department at mit had, and has, quite a few outstanding professors. perhaps the best of all is mehran kardar.

[@aravinda513]

The guy who bunked this class would regret for life😂

[@ArnabDutta-w5e]

Bro it is MIT they don't have thought and mindset like you 😂😂

[@devidkonwar7736]

​@ArnabDutta-w5e if it is MIT,then no need of teachers like him in MIT, student itself can study because many sources are available & they are capable enough???

[@hasham77]

So damn amazing , never had such a lecture in my whole engineering. so envious, what a quality education they are having 👍👍

[@lecturesbywalterlewin.they9259]

:)

[@danceswithstone]

Somehow, this lecture always end up back in my feed. I've already watched it a couple of times, but a year goes by and. . . there it is again. So, I watch it again. I don't have the time to watch it again, but I do. . . VERY NON-INTUITIVE.

[@samhouston2000]

I am watching second or third time again, I don't know why either. Very Non-intuitive.

[@johndoesson]

My guess is the youtube algorithm, they have discovered after x time a significant portion of people will rewatch something because most often they forgot they watched it and will make the same decision like the first time (to watch it). I have fallen for this several times.

[@florencegomer7937]

My guess is people are looking for revision material before impending exams and those extra views cause the algorithm to promote it as a recommended video ...

[@matthewkemp8658]

Agreed

[@mahmudulmilu8683]

From my childhood, love and attraction for physics is in my heart. Meanwhile I became a Biomedical Engineer. But when I watch the lectures of Professor Lewin, I think I was born to be a pure physics student. Love and respect Professor Lewin.

[@zellous2928]

I have to say professor lewin, this is my first time taking physics in college and I come to your lectures to gain deeper understanding of the material, and you truly make me smile and just pause the videos some times to be like wow that’s awesome physics is amazing. Most of my professors at my school are very good at what they do but some just can’t capture the enthusiasm to get us excited about physics like you can. For that thank you! And congratulations to you for nearing 1 million subscribers. Forgot to mention, your book “for the love of physics” is also very good as well!

[@richardcarew2481]

When you really understand a subject, teaching others is easy because the concept can be passed along very easy with easy to understand language... even very complicated ideas... most people, for instance, think math is hard... we are taught that in school by every teacher we have... math is not hard at all, but when people who don't understand it try to teach us.... it teaches us that... math is hard.... my father was a nuclear physicist, and around the time I learned how to read, my father explained the basics of calculus to me... I was 3.... what he did was: described the flight of a ball thrown by hand... arcs, acceleration, basically, Newton's laws of motion.... it was clear enough that I have never forgotten the lesson... I gave my own son the same lecture... he was in advanced college calculus in 7th grade.... watch Richard Feynman to see what a real teacher is like... The laws of motion, like mathematics, are pure logic... with logic, all of this is clear by measuring the variables correctly... if this... then that.... Boolean logic... Peace

[@bluehome8193]

16:52 "How is nature going to deal with that?" Brilliant, just like the whole lecture.

[@rcarendsen]

I totally love this visual way of teaching... people tend to understand it better than numbers and formulas alone... And you can see this teacher is enjoying teaching ... 🥰 that also motivate the students

[@harrysingh3888]

I can literally watch this lecture lying down on my bed, cause this is more interesting than Netflix for me.

[@ajosefrancos6694]

It's clear that you have such a clear understanding of the world around us, I am Design Engineer and I have seen your Lectures countless times. In my opinion, you are the best lecturer in the world. Thanks for sharing Kind Regards, Angel J Francos

[@lecturesbywalterlewin.they9259]

Thanks for you kind words

[@mohammedluckman4947]

I just wish he was my physics teacher because my love and understanding for this subject would be different today! Such an excellent teacher truly amazing if only other teachers taught like this!

[@sagniksaha7359]

Hello sir I would like to thank you for these wonderful lectures. They are truly amazing. Thanks to these lectures, I developed a love for physics and I am happy to say that I will be starting college at Cornell University this fall as an undergraduate (majoring in physics). Although I may never get to meet you in person, I would just like to express my heartfelt gratitude for everything you've done for us. Thank you professor Lewin :) Regards

[@daviddonaldson288]

How is class going I’d imagine phy2 is coming best of luck with electricity

[@mileschun143]

"If you have problems with this, you're not alone. See you Wednesday."

[@daddysnip6397]

i love it

[@Tom-cn4cm]

@@daddysnip6397 I too love it when teachers leave their students feeling helpless! After all, actually understanding the content of the class is for losers!

[@user-xl5kd6il6c]

@@Tom-cn4cm Classes are to learn, not to spoon feed you. The thinking and understanding, has to be done by you alone

[@51KTM51Hurricane]

Hahaha a good one

[@thierryfaquet7405]

@@Tom-cn4cm teacher can't make you learn something. They can only present you the matter. Obviously the presentation's quality is of importance but only you can do the learning.

[@Tobeon2]

I have Ph.D. in Environmental Engineering, but I want to go back to school for physics now!!!! WOW, what a great teacher he is!!!

[@ashrafali4297]

God bless you!

[@jjvideo8349]

Bravo, I would have loved to have a teacher like you 50 years ago, and beeing able to re-watch the videos untill full comprehension, thank you

[@luca4229]

So this explains why on my motorbike when going at a reasonable speed, if I want to lean on the left I have to push on the left handle instead pulling it towards me! It always seems strange to me as logic would say "turn left = turn handlebar on left" but doing like this I actually turn right. Thank you for this lecture, angular momentum, spin angular momentum and torques were the hardest argument of physics to understand (to me) and you really helped me a lot with your demonstrations; this demo, in particular, is very enlightning.

[@lecturesbywalterlewin.they9259]

:)

[@Demki]

And it even tells you why you want to lean to the left in order to turn left, because that applies torque to the wheels which turns the axis of rotation to the left. :D

[@anomalyp8584]

Yes indeed!!!

[@zzpazi]

There's more to motorcycle steering dynamics, it's actually pretty complicated. In addition to the gyro force, you're also deflecting the support point (wheel contact to road) from under the center of gravity, which also tilts the bike. The actual change of direction, and the amount thereof, is then another matter entirely.

[@GC9010]

Not to mention the decaying circumference of the wheel as you lean further over causing the path of the bike to follow that direction

[@michaelhills5463]

A tremendously gifted teacher.....preparation, practicality, applicability -- essence of teaching

[@Ajinkya738]

This is the actual teaching method, Walter Lewin teaches from his heart 💓 💓 And I love the gyroscope concept.

[@abcdonkeys]

44 years ago, my first job was as a rebuilder of bicycles.. I used to spin a front wheel on a bench grinder wire wheel.. I found the force interesting.. there is magic in this force, I dont think we fully appreciate this force..

[@mrjleex]

You do every time you ride a bicycle. It keeps you up.

[@miguelangelsimonfernandez5498]

an outstanding lecture. You and Mr Feynman are my all time favorites

[@lecturesbywalterlewin.they9259]

Thanks Miguel

[@b9r0m85]

Walter Lewin ^ Richard Phillips Feynman √

[@rich1051414]

My favorite Feynman clip: kzbin.info/www/bejne/hX2ZXqtmotSXrbs

[@ctx4241]

My teachers didn't bother to bring their notes sometimes, this legend has whole motor, hanging hook to have axis for spinning objects, whole gyro for demos. Life's not fair :D

[@zainabhussain3887]

😂

[@lavik472]

Wow, doing PhD but the love for physics increasing a lot, the same how precision increases due to heavier mass. You have drank physics, now you are pouring it on us. One of the difficult concept of physics Many thanks

[@toosiyabrandt8676]

HI That would be PRECESSION!!! Shalom to us only in Christ Yeshua

[@colfaxschuyler3675]

"With our knowledge of torque... CALM DOWN .. With our knowledge of torque..." Who can remain calm when we're taking about TORQUE!?

[@e-pi5189]

Your lectures are awesome. I had spent months pondering around different websites , books etc . but still couldn't get a visualisation for this topic ( esp. ) you cleared all of it in an 1hr ( -10 min , 48 sec ;) ) . Can't thank you more !! P.s. Hope we had teachers like you in India !

[@lecturesbywalterlewin.they9259]

:)

[@e-pi5189]

BEST DAY OFFF MY LIFFFEEE !!!!! WALTER LEWIN REPLIED !!

[@lecturesbywalterlewin.they9259]

😊

[@sagarshenoy]

Great video. Walter Lewin is amazing! In India too, there are some amazing teachers and I am lucky to have attended lectures of a couple of them, but yes, these kind of teachers who don't just speak, but 'show physics' are rare in every country, including the US :)

[@onahuchenna8921]

@@sagarshenoy You're right! Passionate teachers are rare in every part of the world.

[@durgeshnimse6678]

What a man.....never visualized these dynamics in such a wonderful way .......thank you Walter lewin sir for sharing it...read your book and it really made me love physics ....need these type of teachers in Indian schools ❤❤💛💛

[@francescocuccu4218]

You have no idea how helpful and inspiring you've been for me. Thank you very much.

[@lecturesbywalterlewin.they9259]

You are so welcome!

[@alexanderblackwood9143]

I love how he gives nature a human persona. Such as calling nature "clever". It makes the advancement and understanding of science not just a pursuit but a competition against a wily foe. Humanity is always substantially more driven to accomplishment against an adversary. Not only does this increase the primitive interest of is youthful audience but I feel Professor Lewin isn't just doing it as a teaching gimmick. I feel his respect for Nature. Every, "It's non-intuitive!" comment from him sounds like the "Well played" comment to a dear friend over a game of chess who has just made a brilliant move.

[@NovaWarrior77]

Brilliantly put.

[@grenzviel4480]

I would be horrified if I knew that there is an exam coming, but for me to just watch it is pretty nice

[@davidschmidt6013]

I recently retired after teaching for a bit over 20 years in several of the top international schools here in Thailand. I can only say that I wish I'd found this gentleman's lectures sooner. But better late than never , as I used many of his lectures and videos on rolling masses to help my middle school kids wrap their heads around basic concepts of physics. Bless you, Dr. Lewin.

[@SpocksBro]

Imagine doing the wheel precession experiment in front of a crowd just a few centuries ago. You'd be burned for witchcraft.

[@whoopshoopadoop8900]

I had a similar thought. The court wizards were probably just physicists. "Me lord! Check this shit out! Wheel falls, right? Makes sense. But now look at it! STAYS UP ON ITS OWN! MAGIIIIICCCCC"

[@MisterIvyMike]

@@whoopshoopadoop8900 Burn the Whitcher!

[@bigmike9527]

you are exactly right. !!

[@MichelJosephCardin]

Yes and I am thinking that; still today; this is a mentality state that humanity is stuck on.

[@jimleane7578]

Now i know why witches rode broomsticks not bicycles

[@bwandesky]

I cant believe I just sat down for 49 minutes learning physics, yet I don't have any exam coming up. Very captivating. This changes the way I perceive circular motion. Now I'll be thinking more than twice when I see a bicycle in motion. Awesome content.

[@filipkaravas603]

In my country we learn those things in highschool in much less depth and yet it was so hard to undertand it. Ive been 20 minutes in this video and I cleared almost all questions. Trully amazing the power of a great teacher.

[@curtyahn6556]

Ik vind je lessen geweldig. Je brengt natuurkunde tot leven, meer dan enig andere natuurkunde onderwijzer (in meest brede zin van het woord). Love your lectures. Physics lectures as they should be. Rekindles my love for physics big time.

[@AuroraClair]

I wish we had a professor that teached with such passion

[@AuroraClair]

Also, thank you for making these videos available to the world!

[@gabevf]

*taught (fixed that for you)

[@AuroraClair]

@@gabevf tnx lol, I guess my English got a bit sloppy x)

[@md65000]

"The angular momentum vector chases the torque vector" -- I was having trouble with this topic but as soon as you said that it all came together-- I understood it perfectly! Why can't textbooks and (other) professors explain these things so plainly and simply?!? :(

[@NewtonCazzaro]

I am an engineer, but I try to watch KZbin for fun when I am not at work. Somehow the algorithm thought I would think this would be entertaining and fun and made me watch this entire class for an hour at 11 PM when I should be sleeping. Thanks, KZbin. Like this, if somehow you find yourself in a similar situation so we can examine how common my case is.

[@JAXi9321]

This is how teachers should be. I've had the pleasure to meet few ones with the burning love towards their "subject" (can't find right words) & teaching, but mostly they're just there for some other reason (or lost the "love"). Absolutely love him and his lectures.

[@il2648]

the best lecture about the stability of spinning wheels ever!

[@NoosaHeads]

(14 minutes). The hollow tube lost the race but as the incline approaches 90 degrees to the horizontal, they will both arrive at the finish line at exactly the same time. As the incline approaches zero degrees, they both will arrive at the finish line at the same time - ie infinitely long. I'd like to see a graph of the time taken for each cylinder -v- the incline angle.

[@carultch]

Interesting question. One factor you might not be considering, is that the equation derived in this lecture is based on roll without slip as a condition of this problem. On a 90 degree incline, if you still maintain the roll-without-slip condition, you will find that they do NOT take the same amount of time to fall. If you were to actually carry this out, you'd find that there is a breakpoint where the contact turns into roll with slip, which voids the equation derived in this lecture. But there is an example we can give, which would still allow roll without slip on a 90 degree incline, and still use the formula from this lecture. Suppose you had two yo-yos, one with a string around a solid cylinder, the other with a string around a hollow cylinder. Upon dropping them, the yo-yos are not in free fall like you might expect. Instead, there is a tension force pulling tangentially, upward via the string. This will slow down the yo-yo with the greater ratio of rotational inertia to m*r^2 when compared to the other yo-yo, where r is the spooling radius.

[@Nodjia]

I still find myself wishing I was in this man's courses. He does a wonderful job of explaining non-intuitive physics. We need more educators like this.

[@jasminekharazmi7047]

Non-intuitive physics? I sense pretty a lot intuition behind it.🤔

[@darthtagnan12]

Hi, I’m from Quebec in Canada. It’s a real pleasure to watch your lecture. You were a really good teacher. I don’t have the background but I like your lecture .

[@GrayStrider]

Thanks, KZbin. This is the kind of recommendations I want to see while studying Physics in my lyceum. Thank you very much for lectures! I love Physics even more now

[@alex89paredero]

6:04 I don't know what I'm doing here. Great lessons Walter Lewin, these leesons are impressive

[@razaqalmarsoomi6757]

Excellent lecture, great teacher, I wish he was my teacher when I was student.

[@AdityasEPFC]

The best demonstration on gyroscopes on the internet. I'm currently studying Gyroscopes for Aircraft Instrumentation and found this very helpful. Thank You Mr. Lewin!

[@lecturesbywalterlewin.they9259]

Wow, thanks!

[@luiscolon7195]

Love this professor, I wish he was my teacher in high school. Love how he takes the number into practice

[@gustavtd]

This is not a high school I guess?

[@dammy5786]

@@gustavtd nope it's MIT

[@NativeNewMexican]

This lecture is one of my top 3 favorites, I'll be looking at more of your lectures to come. (The other ones were about the Ruben's Flame tube and inertia)

[@gallectee6032]

"The hollow one lost, and even fell on the floor" at 13:34 that made me laugh because the last part is so irrelevant that it was funny.

[@temporaltomato3021]

Just pointing out how much a loser the hollow cylinder is in total.

[@Aristothink]

Amazing lecture. He covered so many parts of spinning wheels....OMG..Walter Lewin is still the best teacher I ever encountered in my life.....I am happy I could have class with him, when he used to teach at MIT. Wonderful days....Now, it's available to everyone here at the Internet. This material must go on FOREVER since it's the best material to study Physics. He really makes us think....The others Physics teachers only makes us understand Physics....

[@bigfuss4135]

I fall in love with physics after watching this great professor's lectures. However, I didn't fall in love with "this"... 21:17....

[@ElectricExperimentsRobert33]

Nice demonstration..

[@joseph-mariopelerin7028]

Zzz... useless! Just like you need math to calculate how long you going to stay airborne while jumping in the air....

[@barrybernau4957]

Electric Experiments Roobert33 6

[@vivid2474]

Pure awesomeness.

[@jacobvandijk6525]

But at 18:51 the experiment is non-sense!

[@generalralph6291]

Prof: See you next class! Me: Oh. No, thank you, professor. I’ve already learned all I can learn in a lifetime.

[@lecturesbywalterlewin.they9259]

Excellent!

[@Pavel_draganov]

@@lecturesbywalterlewin.they9259 hello sir, are you from the netherlands?

[@oJackOfSpades]

I have a masters in economics and never took uni classes in physics. My main language isn´t english either, yet I still stayed for the whole duration of this video... I gotta say, understanding the concept is fairly easy and I find it interesting, but I`m glad my grade and future at the course is determined by the math to prove each experiment. I think it´s much much easier to enjoy something when it´s not a chore and so much depending on it.. I somehow doubt a lot of actual physicsmajors would enjoy this video as much as I do.

[@mizar52]

Very good explanations , with excellent examples . I'm french , and I would have liked to have such a teacher, 20 years ago . And We had only equations on the board, and no equation explained . * * * * *

[@lecturesbywalterlewin.they9259]

:)

[@VestigialHead]

+mizar52 Yes I totally agree with you. I loved the experimental side of physics but because the teachers had a very dry way of showing the maths I quickly became confused and turned away from the field. I regret this now. The internet has shown just how good instruction and teaching "Can" be. What stuns me is I had assumed that modern teachers would watch the innovate ways of teaching on the web and copy them. But the majority do not. they trundle on with their archaic outdated methods and wonder why most students get bored or left behind. People in charge of education have a lot to answer for. Thank you for your passion Professor Levin.

[@tokiniainaricky8588]

salut mon frere

[@SameBasicRiff]

7 seconds in "calm down" LOL makes me feel like I'm right in the class haha

[@enriquesanchez2001]

THE BEST Physics lecture I have ever seen. And I really bad at mathematics. ♥

[@endless_universe2023]

very nice and visually loaded experiments. maybe the prof is a bit old-school, but his desire to teach is genuine. Kudos!

[@MrPLC999]

Fifty years ago, I knew all these equations well enough to get A in every physics class. Now...well, ahh, I can draw a nice triangle for you...

[@280zGaitan]

23 years ago for me. I knew all these along with chemistry. Now, I can draw a nice square, triangle and a good enough circle 😁😁😁. Great reminder that if you don't practice it you lose it.

[@giovannispinotti]

Did Physics at the university, passed all hard exams back then, about 30 years ago. We surely did all this stuff, vaguely remember the symbols only when I see them on the chalkboard. What I find though is that the professor goes away with math way fast. I can still follow most.

[@BillAnt]

Why even spend all that money on college when you can just go to YoutTube University?! ha-ha

[@niueanlaho]

@@BillAnt KZbin Uni is the Best......

[@inevitablecraftslab]

so you just learned it and never understood it... happens to everyone :)

[@djurodjuranovic4299]

This just reminded me how impressed I was the first time I saw my physics teacher draw a dotted line just by angling the chalk on the board :D

[@jamesraward]

I had a couple lecturers like this - it's what made me love engineering.

[@cesarmenezesvieira8788]

Mr. Lewin is always really amazing, but this lecture is incredibly outstanding. You can watch this video many times, and it is always awesome. Thank you very much, Sir. Greetings from Brazil. :)

[@spetsnatzlegion3366]

Low IQ play: using a leaf blower to spin round on a rotating chair High IQ play: using angular torque to spin round on a rotating chair This guy makes it impossible not to love physics.

[@prernasharma7395]

You make physics feel so interesting, Sir! Thank you so much for this amazing and intriguing lecture! :)

[@nawazuddin1237]

To become like him is dream .. the great legend lewin..

[@justanotherperson2960]

Thank you Professor Lewin! I am preparing for spaceflight dynamics interview and I was a bit nervous on the torque computation. Your video is brilliantly simple for me to understand some fundamentals which would otherwise be "phenomenally unintuitive" as you put it! Salute!

[@yiquanchen7916]

Absolutely amazing physics course I have ever seen. Thanks!

[@JasonAchilles]

41:41 "What the hell..." - wins lecture with demon suitcase

[@r3n308]

Hahahha

[@vivekpathak5717]

at 29:40 you mentioned page 344 of some book can you tell me the name of that book ??

[@lecturesbywalterlewin.they9259]

8.01 Physics Hans C. Ohanian 2nd edition W.W. Norton & Company ISBN 0-393-95748-9

[@jenniferlechic]

In love with this professor. I've never gone to college but I've always been fascinated with science and enjoyed math. He really inspires me to start taking classes, even though I just turned 34 a week ago.

[@lecturesbywalterlewin.they9259]

*34 is a perfect age to start a new life*!

[@62saki91]

3 am, you tube algorythm: hey wanna learn about physics for rolling motion and gyroscopes? Yes.

[@bugelpavel]

Same, man, same..

[@NihangShah]

Same. But, it's 4am. So easy to learn with practical examples.

[@e-1632]

Give me more

[@helloimnisha]

Great lecture. I never thought Gyroscopic precession could be made so easy to understand. :)

[@lecturesbywalterlewin.they9259]

:)

[@MrRFasters]

For on our walls of life science: "And through friction of course all this fun comes to a halt"

[@JasonAchilles]

ha yeah I caught that one too.

[@ammarfarooqui8331]

Such an Amazing video! What a passion Sir has for what he does! I understood this phenomenon clearly for the first time ever. Great Video Sir.

[@Bluesbreaker76]

I finally understood how the counter-steering on a motorcycle works

[@sudarshanbaruah2557]

gotta fall in love with physics once again... after so many years...

[@rabindranayak4481]

So terrific example of gyroscope , thank you sir

[@johnjosephmercadante6664]

This is something we experience everyday but we have been acustom to these facts but never question it. I've learned that everything has a reason for acting a specific way, most just except things, question everything, the reasons may surprise you. I’ve experienced these facts but never knew why, I've just found out why, Thank you.

[@lautoka63]

This is great, but ... It reminds me of Engineering school some decades ago: everyone so busy writing stuff down that they miss much of what's being said. Give them the notes, so they can listen and mark them up as they see the need themselves. Hopefully, that's how it's done nowadays.

[@hassankhan-xq8et]

unfortunately, a lot of classes still have you make your own notes. Some professors post lecture slides after or before class.

[@Ergoziser]

at my engineering school in germany we are given all notes in every class, but I still write down a lot myself. It helps to somehow process it and keep it in mind better.

[@krishnaghosh5281]

It's December 2021, let's see how many legends are watching this brain-touching masterpiece lecture🥰.

[@atikshagarwal5147]

Bhai aaj hi jee ke liye

[@OlivierSuire]

What ? No standing ovation ?

[@magsarbatkhuyag2945]

I love watching your lectures. because i am physics teacher, I always learn from you how to teach in an interesting and understood way. thank you