Professor, sir, I just want you to know that you have helped millions gain an intuition for things they never could have imagined possible, and I, amongst many many others, am truly indebted to you. Thanks a lot for all the help you have provided when my teachers couldn't answer my question "WHY" countless time. Love from Singapore :)

I love it when u say hello hello hello

You are truly the best physics teacher I've ever had the privilege to learn from. I've watched many of the old MIT lectures and enjoy seeing your home classes! You are right about making physics fun and interesting! Love you very much and appreciate all you've done and are doing Dr. Lewin!

sir even before this i have already pledged that i will be thanking u for all my life..this is one more..u have been awesome professor for me..

Thank you for covering this! I was literally asking myself this question 15 minutes ago. You're a grade saver.

Physics for everyone Progress for everyone

Really worth million dollar !!!

This is the 1 billion dollar video..... Santiago Mexico (67) Engineer 1975, MBA at Wharton 1978. Acoustician . Best teacher ever had !! Thank you

Million dollar... It Deserves.... Keep making us prosperous.. Thanks

Wao × infinite..great great great.... thanks word is so small for you sir

Its not million dollars, its priceless. And so you are, I want to be a teacher like you . Love you

Thank you, Mr. Lewin, you're my hero!

Dr. Lewin, great clarification!! I suggest you add "angular velocity vs angular frequency" (or something like that) somewhere either in the video title or in the description, so it's easier to find...

1:08 Yup...he's gettin' mad. I love this part.

Thanks so much Professor Lewin. You are Physics

I shall be grateful forever.... Thank you so much Prof. Lewin 😊

Oh man, you explained it crystal clear. Thank you, Professor!

It's truly worth million dollar, thank you professor!

Thank you, Sir! That was exactly what I needed.

He's exactly looking the same what I imagined a physics professor as.

What a sweet guy,, teaching us all for free

It's a billion dollar worth professor! Thank you very much for the clarification 😊

Awesome explanation! People who disliked this video might have been previously watching Lady gaga songs too much and bumped into this video. I cannot blame them.

I love your clothing style, Professor Lewin. Also, nice video :)

You are right ...need to watch video more than once !!!!🤘🤘🤘REALLY MILLION $ VIDEO!!!!!!!!!THANK YOU PROFESSOR

Great Professor Lewin 👍 you always great, my prayers for your good health.

Thank you Mr. Lewin you made me love physics :)

This distinction was definitely glossed over in my physics class. Thank you for clarifying!

amazing thanks. clicked on the 2nd example.

Angular velocity can be defined for any angular motion, which may be periodic (maybe SHM or no) or may not be periodic. However, angular frequency is only defined for periodic motion. This periodic motion may or may not be SHM. However, this angular frequency is solely defined by the time period (2pi/T) and as time period is characterises ANY periodic motion, angular frequency is constant for ANY periodic motion. The case where angular velocity and angular frequency match is the case of constant circular motion. Angular velocity is a constant as equal angles are covered in equal times. In essence, 2pi angle is covered in T. But this is also a periodic motion and hence the definition angular frequency also applies. As the time period is T, angular frequency is also 2pi/T and it turns out the two quantities are the same. Sir, is my explanation accurate?

Dear teacher: Thank you very much for your videos and such beautiful explanations. Greetings from Argentina

Bravo Monsieur Prof.

I appreciate, I am the one who is not impressed by others as much easily but you respected sir is the one by whom i am impressed in life.You're Brilliant Masha Allah. Thanks for teaching us, for sharing knowledge and ofcourse concepts. May God bless you

Today I got to know why you are the best because you have the crystal clear concept when I was in high school I used to mug up the reason never tried to for the reason and that is my biggest fault,,,I need your blessings sir you and your concepts are just awesome.

*simple harmonic motion can be described as the projection along a diameter of uniform circular motion(U.C.M)*.As the reference point in U.C.M completes one revolution the S.H.M complete one cycle as well,so time period and frequency of both U.C.M and S.H.M points are same.Angular frequency is simply the speed of reference point in U.C.M (that is angular speed).Now this is called *angular* frequency of S.H.M to signify it's connection with the U.C.M.

Thanks. I have watched your physics lectures which are really to inspire my physics senses. (A physics scenery is that you demonstrate the wheel turning by you standing on a rotatable chair is really sparking my eyes.) That is a good help. Your clothes is good and colorful on this video. I found your head spontaneously shaking in this video and this makes me search Wikipedia about you. I wish your body healthy. I like your loudly emphasizing the points of physics. It is clear and humor in every physics video lectures. Really really thanks. 👍👍👍👍👍🙂🙂🙂🙂🙂

sir the dedication and passion you have for teaching is upto different level ,i have no words to say because they are less as compared to your efforts thanx a lot ❤️

Apart from the absolute greatness of this video, nice tie sir, And I think I recognize the pattern, I think it's on one of your salt shakers as well. Great design.

Thank you sir, You are truly the GOAT. You made me fall in love with Physics.

Sir you r world's best physicist...love from india .

Thanks! So much clearer than all the answers on Quora! (They are all so misleading, even from “Masters in physics”, “teachers in physics” etc.)

Thank you , I'm now definitely a millionaire :)

Thank you all the way from Iraq sir this is the first video of your channel which I watch and I'm in love with it!! I wish I was your studentt💎

Beste Walter Lewin, professor als geen ander. Onze zoon is nog maar net 10 jaar oud en hij geniet nu al van uw video’s. Wijzelf genieten er ook van en steken er nog wat van op ook. Nog nooit heeft iemand ons beter weten te bereiken en te boeien zoals u dat voor ons deed. Uw video’s zullen ons volgen tot ver in de toekomst. Veel liefs….. wij die genieten van u.

5:52 Very simple to understand. Just need to work out a few problems now to really cement this technique and avoid the confusion of the notation. Thanks Professor!

Thank you sir... My confusion is cleared (just like you said) once and for all. 😊

Great video! Currently I'm considering Chirality and the formulas you presented. If you could do a lecture on chriality on a torus geometry considering it with Quarternions and Hamiltonian Mechanics I would be grateful. It could be made into a set of videos. Thanks for considering the idea and my very best wishes to you, regardless of whether you do it or not.

I was having headache due to this confusion from past two days. Thanks a lot for help.

Simply awesome #makemescientific

Thank you professor very much. It helped me to eradicate my confusion.

Walter Lewin, Sir I do think there's an indirect connection between the two. Take any SHM and draw an equivalent phasor diagram of the situation... The angulat velocity with with the phasor will be rotating will be EXACTLY the same as angular frequency in magnitude... i guess that's why they have similar symbols too.

Just 👏👏👏👏(especially for your explaining and of course you have a lot of compliments from me for your "modern-classic-popular" style)And we are the richest students because we have You in our life!THANK YOU :)

I am not great with words but THANK YOU SO SO MUCH especially for these problems' series , ( but I at least wanted to be big with them )

Yeah, it sure is a million dollar video... Thank you sir, it'll be with me for rest of my life

I never see you Mr Walter....I never been in USA...But i think you are great guy have alot of knowledge...best wishes.

many thanks porofessor. greet with respect.

got to love the passion he puts into this

These examples made me understand 😊 thank you sir

It's amazing Walter. So basically we can say that the angular velocity is used to describe the angular motion in the same way as x, y or z is used for linear motions. However, the angular frequency is just a shorthand way of measuring "timing" in cyclic processes (indeed the frequency of this periodic phenomena), and therefore in general terms they have nothing to do with each other (only if there is a completely linear dependence with a constant angular velocity). Thank you very much, and of course I will remember for the rest of my life this lecture when I have rotational problems to solve. Thank you one more time my friend ;)!

this was a life saver!!! thank you sir👍

thank you so much for your video. it was just EXTREMELY clarifying

Thank You so much, professor.

Hi Professor Irwin It is great to see you again. Just want to let you know that I was watching a lecture about kinematics in 1Dimension also in 2 Dimension. The course is on mechanics on edX from Rice University, when the lecturer measured the displacement by a meter stick, he didn't give the uncertainty at all. He just had the length he measured but no uncertainty. You always say that the measurement is meaningless without the uncertainty. You are looking great my friend and take care.😊😊😊

Thank you very much

Just want to say..... “jahapna tusi great ho”. ....LOVE YOU SIR......🙇🏻🙇🏻🙇🏻🙇🏻🙇🏻🙇🏻🙇🏻

May Creator make you live long to serve the students in this world.

Thank you!!!

undoubtedly, million dollar lecture. salute you, sir.

Thanks as always professor!

Sir your way of teaching is so much awesome,such that I understand the concepts in one shot Thank you very much sir

Always love to watch your lectures 👍

Thanks 🙏🙇sir, you are really a great legend.........

Indeed it is worth a million dollar ! Respect for you surpasses all imagination ! it's a limiting case tending to infinity !

It hit me in the face like an airbag! Although no one in my class told me the difference ever but I imagined it somehow instinctively, never have been able to put the finger on the right spot. That helped.

Thank you professor, it's been a pleasure to be your student.

My dear sir, God bless you.

Thank you so much Sir ❤❤.. Now we are friends 💖💖💖💖

I understood and like the video. Thank you, Professor.

This is a million-dollar video. Loved it Sir

you are a great inspiration professor. I love to watch your videos :)

Excellent 🙏🙏🙏🙏🙏🙏🙏

Thanks a lot sir...!

Thank You Sir

Thanks. From Bangladesh.

Dear professor plz specify the acceleration of uniform angular speed...although at constant speed there exist tangential acceleration and radial acceleration orthogonal to it. Hence when you said constant velocity I got the impression that it derivative is zero but I had thought otherwise....plz specify one more time how accurate I might be....I really thank you for your time as one of the greatest in the field...

Thank you! I wish I'd had your explanation forty years ago. :) Better late than never.

thank you , professor for clearing this misconception

I thank you for this Million dollar video for the rest of my life!

All respect for u prof .... my oxygen is ur videos

Will give my right hand fot semester with someone like Mr.Lewin

Thankyou sir for such a good video

The concept was really confusing before I watch that video.But now I get some idea about angular velocity and angular frequency.

thank you very much ,really this video deserves million dollars ❤️❤️❤️❤️

thank you professor . it's more valuable to me..... you are really a boon to every students....

Love you, Proffesor Lewin....

It consfused me a lot thanks proffesor

thank you professor... I had this doubt in my mind for weeks.... yay... I just became a millionaire!!!!!!

Sir you are the best ..... i wish i could be a student of yours ... 🙏🙏🙏🙏🙏🙏

thank you sir from India

We love you, Sir!