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MIT 8.01 Physics I: Classical Mechanics - Fall 1999

author: Walter H. G. Lewin, Center for Future Civic Media, Massachusetts Institute of Technology, MIT
recorded by: Massachusetts Institute of Technology, MIT
released under terms of: Creative Commons Attribution Non-Commercial Share Alike (CC-BY-NC-SA)


We are always trying to improve the service we deliver to our learners. One of the most effective ways we have of identifying improvements is by listening to your views and opinions. Here is a change we have introduced as a result of your comments and feedback.

You said: Your videos are all in English and this makes it difficult to understand. Our response: We've built a translation engine for you!

This course has been translated from English into 11 other languages with the best machine translation engines available.

The languages we prepared for you are the following: Bulgarian (Български), Czech (Čeština), German (Deutsch), Greek (Ελληνικά), Croatian (Hrvatski), Italian (Italiano), Dutch (Nederlands), Polish (Polszczyzna), Portuguese (Português), Russian (Русский), Chinese (漢語, 汉语).

Enjoy the lectures and >>PLEASE TAKE A QUICK SURVEY<<



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Reviews and comments:

Comment1 Eang Seang Hor, February 1, 2009 at 10:15 a.m.:

Dear Sir
He teach very good. I am really interested with his teaching.
I hope that I can see the other subject of his teaching in physics. I really suprive that I can improve my physics through out of the Internet.
Thank you so much!

Seang Hor

Comment2 R Dixit, February 21, 2009 at 2:45 p.m.:

Hon'ble Professor is doing great job.he is spreading knowledge though the very best medium internet.It is very useful and interesting to views these lecture.It is my firm believe that some courses which are assumed to be tough for understanding perspective , would benefit thousands and millions of students in coming days to learn the concepts.It will also popularize physics among students in some countries where there is no good infrastructure and proper faculty.
The Pedagogy of 'Young Professor' is amazing and quite inspirational for others Gurus to have such energy level.
Last but not least, this initiative is definitely giving the right direction of learning though Internet.

Thanks And Best Wishes
R Dixit

Comment3 asif, February 23, 2009 at 5:46 p.m.:

sir lectures are very good iam iit profesor in hyderabad india thank u please let me know that THE VIDEO LECTURES ARE AVAILABLE SEPARATELY.

Comment4 MUHAMMAD MOAZZAM ZUBAIR, February 25, 2009 at 6:14 p.m.:

Many feelings; 3 words: I am speechless....!

R&D Scholar, CEO & GM T&M COMPLEX OF ENTREPRENEURS, AN ENTRPRISE IN lAHORE, PAKISTAN, working with research interests in Science Education........

Comment5 Lior, March 11, 2009 at 11:56 p.m.:

"Making physics simple" should be the title of each video.

Apart from being crystal clear and easy to understand, he makes the videos dangerously intriguing.

Comment6 Tuhin Malik, March 30, 2009 at 5:09 p.m.:

This is a very usefull web site.

i am a student of Scottish Church College. kolkata. B.Sc Phyics Hons.

Comment7 KGK Murthy, April 3, 2009 at 2:25 p.m.:

It is very very interesting that PHYSICS can be taught this way. The confidence Lewin expresses in each topic is excellent and deserves highest regards. I appreciate the organisers of this opencourse ware a grand success and the students of the world a good time with the lectures

Comment8 Kuta, April 11, 2009 at 4:20 a.m.:

It is immensely interesting, I feel enlightened! Thank you Professor and MIT.

Comment9 YK Maheshwari, April 11, 2009 at 6:57 a.m.:

Prof Walter Lewin has set a benchmark in physics teaching.
His concept explainations, drawing meticulously on the board, taking thru question and answers, sometimes when experiment fails- explaining so that what ever he does can be emulated by people.

Everything is so live in the classroom. At the same time the best professor of MIT can be seen in remote corner of the world without any travel.

Remarkable feat by all means.

Comment10 Giancarlo, April 13, 2009 at 3:58 p.m.:

Wow, the physics with you is so simple. I live in Italy and here there aren't professor so good.

Thank you.

Comment11 asif zaman, April 15, 2009 at 11:15 a.m.:

sir i m realy inspired the way sir Lewin is teaching physics. sir can i get a cd of these lectures.thanks.

Comment12 Dr.Yousefi, April 24, 2009 at 3:22 a.m.:

Just i can say its very nice and very good lecture.
He can teach very good physics concept.
Best Wishes for him

Comment13 dean schunk, April 29, 2009 at 7:23 p.m.:

these are the cooles viedos ever

Comment14 landon kistler, April 30, 2009 at 6:58 p.m.:

this are ids

Comment15 hephaestuschou, May 1, 2009 at 4:27 p.m.:

Very good

Comment16 Mundu Mustafa, June 12, 2009 at 5:59 p.m.:

Prof. has made me enjoy physics the more, thanx.

Comment17 Tuguldur, June 22, 2009 at 10:16 p.m.:

I always remember his adventure in X-ray Astronomy everytime when I think about neutron stars.

Comment18 sahar abdeen, June 30, 2009 at 10:29 a.m.:

Inspite of the lecture subject seems primerly, but i understood it by differnent way, i felt that i am understanding it for the first time!!!
Thank you very much Mr.Lewin.

Comment19 zubair khan, July 9, 2009 at 12:59 p.m.:

the great professor in the world i think in physics because he teach the and then explain it in a very formal way to get help from experimental point ofview and this is the thing which is very benefical for those student who are in high school and when he will get knowledge from it so may be they will be the great scientist of the world because the physics is the subject in which we observe thing and to struggle to create it if they will watch these type of experiment which clear the concept behind the obervation

Comment20 Simon Beaumont, July 23, 2009 at 10:50 p.m.:

Brilliant! - having been captivated by the first lecture I enjoyed the entire course: never was mechanics more visceral, accessible and important. The first and last lectures are an inspiration for anyone. The course is the ground floor in any physics education. Sincere congratulations to Walter Lewin: his sincerity and passion as a teacher and the love of his subject are palpable even across the internet. What a privilege to join this class at MIT. Many thanks to all concerned for sharing this with the world.

Comment21 rajeev, August 1, 2009 at 9:24 p.m.:

Wow. mesmerising lectures by Prof. He teaches with such a simplicity and beauty. the very fundamental laws of physics are
extended and explored. Thanks Professer!!..kind regards

Comment22 Shashank S. Jha, August 23, 2009 at 6:40 p.m.:

Wow....excellent lecture....
I can now able to understand the things conceptually with the help of the lectures....

Comment23 Alessandro Abbati, September 29, 2009 at 8:59 a.m.:

Thank you so much for these videos, I am about to purchase the book to go along with these lectures so I can maximize my studies and learn all of this valuable information. I hope to someday be a student at MIT, and perhaps I will be in your class.

Comment24 JOON CHO, October 5, 2009 at 4:40 p.m.:

I will attend to MIT next year, so see ya there guys.

It was excellent lecture!!

Thank you so much !!

Comment25 ARMANDO TOMAS, November 27, 2009 at 4:47 a.m.:

Very impressive...I hope I can meet him (professor) in person and listen to his lectures in person if possible...

Comment26 SAAHIL, November 30, 2009 at 5:53 p.m.:

Can any body tell me that either it is undergraduate physics or A-level physics that MIT has launched..??? Please tell me .. i will be very thankful all of u if u will tell me about this..???

Comment27 Manish, December 7, 2009 at 7:58 a.m.:


Comment28 Kehila Yehuda Salcedo, January 4, 2010 at 1:42 p.m.:

Mi completo agradecimiento a usted profesor!
La verdad es que sus lecturas han cambiado TOTALMENTE la manera en la que apreciaba la física, soy una joven estudiante en México de 19 años! a la que el ver su trabajo, me ha impulsado a continuar con mi meta de ser una investigadora, ser como ud :) ... !!
Ahora, esta página y la de sus otros cursos forman parte de "mis favoritos" en el buscador!!
¡Gracias por compartir su trabajo!

Comment29 yilo, January 6, 2010 at 2:25 p.m.:

His lecture are amazing and legendary.Thanks to him my understanding of physics increased enormously.I am a physic stundent of t he Johannes-gutenberg-university in Mainz.
Greeting from Germany

Comment30 Dione, January 8, 2010 at 1:37 p.m.:

I am a student of brazil.Very good all the material of lecture.

Comment31 Zhou WJ, January 25, 2010 at 11:31 a.m.:

Very good all the material of lecture.I like the professor.

Comment32 cpsingh, February 27, 2010 at 8:26 p.m.:

Dear sir,
I would like to tell you that kinetic energy is not conserved during elastic collision , though initial and final kinetic energy is same. During impact some part of k.e. is converted into deformation p.e, therefore kinetic energy is conserved is not correct.

when a ball is dropped on a floor, after elastic collision, speed of ball is reversed not velocity of ball,velocity is vector u know very well.

Comment33 P K Singh, March 6, 2010 at 4:49 a.m.:

I am an Electrical Engineer from India and after going through a few vedio lectures I feel so delighted on the commendable work done by Prof Walter. Really it is a new experience and Physics has become highly interesting. I shall go through all the lectures and try to pass on the knowledge to the younger generation of today.

Hats off to Prof. Walter

Comment34 Vlad, March 24, 2010 at 9:26 p.m.:

Mr. Lewin, you are great! Thank you!

Comment35 Jignesh, April 3, 2010 at 5:36 p.m.:

I am a 2nd year Mechanical Engineering student in London and this videos are the ultimate help. All lecturers should learn by example from Prof Walter. The fact that he shows everything by real life example makes it even more intuitive.

Comment36 jignesh hirpara, April 6, 2010 at 8:01 a.m.:

it is amazing to make concepts visible to the learner and sir is doing wonderful work a his kindness is reflected in the view from the people. nice to see the tricks to transform the concept in practical manner. but i think that needs lot of innovation and freedom too. i would like to have help, if you give insight to implement at lower grades also, i will be very happy if you help in that and if such activities are going on there please provide those videos also on net.... thanking you..

Comment37 pamir ghimire, April 7, 2010 at 6:16 p.m.:

for the first time in my life, i understood waves! hats off to sie Lewin. with greatest honors from my side, u r the best physics 'teacher' ever.

Comment38 nadher, April 14, 2010 at 8:06 p.m.:

thank you so much

Comment39 tomsah, May 8, 2010 at 1:25 p.m.:

I like the way he teach, i hope iam one of his studen. proof Lewin he is the best physics teacher

Comment40 reza, May 11, 2010 at 12:11 p.m.:

i'm very happy & Surprised.
very thank.

Comment41 Ahmed Gamal, May 15, 2010 at 10:58 p.m.:

Prof. Walter Lewin

- I want to till you that you are my Best Teacher, And your effort is the Best i have ever seen, Many thanks to you.

Comment42 tarun trivedi, July 17, 2010 at 4 a.m.:

Dear Sir,

It was demonstration of excellence in teaching . Skill is the most appropriate word which you have personified. I showed your lecture on "spring and pendulum" to my son and he was fascinated. Best wishes

Comment43 Agustina Aliaga, July 21, 2010 at 12:08 a.m.:

Brilliant! Amazing, as all lessons should be. If i would have had the opportunity of receiving lessons from motivating teachers like him i would have chosen to study physics before! Best wishes from Argentina, thanks so much for this opportunity!

Comment44 clifford, August 3, 2010 at 10:56 a.m.:

fantastic,,,awesome...i cant even find a word on this earth to describe how good this professor a mechanical engineer and i love this

Comment45 Erin, August 9, 2010 at 12:53 p.m.:

I'm a student from China.Thanks a lot for your effort.I've learned a lot from the courses.Thank you.

Comment46 Imran Siddiqui, August 21, 2010 at 10:58 a.m.:

I boost up with your lectures videos.
I started loving physics.
thank you for your ignition.

Comment47 meftun, September 4, 2010 at 1:43 a.m.:

Special thanks to Mr. Lewin from Turkey.

He is one of the best teacher and best person I have ever seen. I really wish to see him and shake his hand.

These lectures are smilar to which I studied at my University. So I can make repetition of the lectures that I dealt with before, with the help of Mr. Lewin and MIT.

Comment48 Abhay Kushwaha, September 17, 2010 at 1:59 a.m.:

Respected sir,
I am in resonance of your teaching,the best thing of your teaching is the way of teaching.I gone through all lectures delivered on Mechanics.

Comment49 MAHMOUD Benaouda, October 16, 2010 at 5:08 p.m.:

In spite of my week english, i find the lectures of Pr Lewin very easy to understand. Althought, the use of laboratory materiel in these lectures help very well, Pr. Lewin is very good teacher.

Question: Is there any translate of the lectures transcript in french or arabic, and can we use them freely ...

Thanks dear PROFESSOR and also MIT for this opportunities ... Salam

Comment50 ganapathi, October 26, 2010 at 12:50 p.m.:

material ver very good sir
i like your class its really wonderful

Comment51 Adrian Arce, November 6, 2010 at 9:36 p.m.:

Prof Lewin you are a genius!! You make physics so easy to understand...Thanks very much Prof Lewin from Ecuador..

Comment52 Ernesto González, November 7, 2010 at 3:44 p.m.:

Dear profesor Lewin:

I have to say thanks for your precious and inspiring life and lectures.

Comment53 Francis BENOIT, December 23, 2010 at 4:47 p.m.:

Dear Gee
Your experiments make physic so attractive and yourtalking show is catch by a non english motherlanguage like me.
I would like to have a teacher like you

Comment54 hamed ghari, December 26, 2010 at 6:47 a.m.:

it was wonderful. really these videos stick physics in my brain lovely.i love physics now.only becouse of your videos

Comment55 Amit Kumar, March 11, 2011 at 4:26 p.m.:

"I have learnt a lot from your lectures, I would like to thank Prof Lewin and MIT for their wonderful and noble contributions ".

Amit Kumar


Comment56 Aljhon T. Matias, March 18, 2011 at 3 p.m.:

I love listening with Mr. prof, i can understand the course well, it is that, Physics is really a difficult subject, concepts, laws and how they interact with our daily live is really hard to explain...It is a very clear easy explanation of laws and concepts based on real experiments... I wish that i will have ateacher as great as him...

Comment57 Siddharth Gupta, April 6, 2011 at 11:26 a.m.:

Mr Lewin,
You Rock You are the best Physics Teachers Its awesome to get to know someone like You MIT ROCKS!!!

Comment58 Usama Anwar, April 23, 2011 at 1:40 p.m.:

Respected Sir,
I m a big fan and lover of MIT.I like Sir Walter's way of teaching very much.I downloaded his lecture but the problem is in downloaded video there is no transcript...CAN anybody help me please.???

Comment59 Usama Anwar, April 23, 2011 at 1:41 p.m.:

Respected Sir,
I m a big fan and lover of MIT.I like Sir Walter's way of teaching very much.I downloaded his lecture but the problem is in downloaded video there is no transcript...CAN anybody help me please.???

Comment60 Raghu ram s, September 10, 2011 at 3:34 a.m.:

dear sir,
i'm very fortunate to get such nice lectures on the net. The students of mit are very fortunate to get such a good lecturer.Excellent way of explaining the concepts of physics. Thank u very much Mr.Walter

Comment61 Suman, October 21, 2011 at 7:41 p.m.:

i thing sir,the mit students r very lucky as thery got u. And we r also feeeling lucky 2 get tihs study materials in website.Thank u.

Comment62 Harris, November 24, 2011 at 6:08 a.m.:


Comment63 leader of physics rebellion, December 3, 2011 at 9:07 a.m.:

This century must be called the acknowledgement rebellion

Comment64 ajit mishra, December 7, 2011 at 8:16 a.m.:

great teacher

Comment65 manuel de la Torre, March 17, 2012 at 12:46 p.m.:

Me licencié en Fisica en 1960, y me doctoré en 1975. Mi amor por la Física no ha decaido, pero el encuentro con el Profesor Lewis ha supuesto un nuevo impulso para mí. No pasa un día sin que le oiga alguna lección.

Un solo reparo ¿ porqué no traducen los subtitulos al español?

Comment66 AS. Safa Ahamed, April 3, 2012 at 2:51 a.m.:

sir, your service is good. u're giving all these study materials for free download, ur service for the extention of the free education is to be appriciated, prof. walter H Lewin teaching approach is very nice, i was able to understand many complicated things through his demonstrations, hope to see all his videos.

Comment67 ashish, April 25, 2012 at 1:06 p.m.:

i am a student from nepal and i'm speechless to talk about this website

Comment68 T.N.Charyulu, June 7, 2012 at 12:17 p.m.:

Prof. Walton is a great teacher, he did a great job, he shared his knowledge with crores of students who are unable to understand complicated things theoretically.

Comment69 Edanur Vural, June 8, 2012 at 1:25 p.m.:

I'm 17 and a real fan of physics, and i wanted to thank you professor. I'd never thought that it is that much fun. Entering this wonderful world with you was brilliant. I want to study psysics in university, I hope things I've learned will lighten my way.

Comment70 Hashim Barraj, June 12, 2012 at 8:16 a.m.:

I am so happy to hear you explaining that I just wish I was sitting there on a chair in your lecture hall to be closer inhaling the same air you are all breathing!
I wish you utmost happiness Dr.Lewin as well as to all your students!
I wish MIT a forever prosperity and thank every single effort done by all its staff who worked to bring to light
all this knowledge to the world!
Best regards to all
Hahsim Barraj

Comment71 SUBHANKAR BHATTACHARJEE, August 5, 2012 at 9:25 p.m.:


Comment72 Ananth Nag, September 13, 2012 at 7:04 a.m.:

I Thanks MIT and Prof.Watlter Levin. He has the ability to make any difficult concept easier. It also becomes fun to learn..really MIT has given its best through this..

Comment73 Biruk, October 25, 2012 at 4:14 p.m.:

I love physics and these lecture is really wonderful. I am a Geophysicist from Ethiopia. It is really nice thing to post all this videos on the internet because those who don't get the chance to attend at such big place, like MIT it is really a great chance. I just want to say thank you for this beautiful lectures.

Comment74 Giampaolo, December 31, 2012 at 10:13 a.m.:

Even if I had not the luck to be one of your students at MIT, I am happy to have now the chance to learn from you throught the web, because your lectures are really a priceless heritage of culture. As you said, “Knowledge only adds, knowledge never subtracs”.
Thank you so much professor Lewin, you made the world a little better. I wish you a wonderful 2013.

Comment75 abhishek, January 25, 2013 at 2:33 p.m.:

great lectures that had made me to learn unparellel physics

Comment76 abhishek, January 25, 2013 at 2:39 p.m.:

sir i am living in remote areas but i can say that i am reading best physics from you inspite of living in remote area

Comment77 Babar raza , February 7, 2013 at 5:59 p.m.:

genius prof lewin thanx to u.

Comment78 Mohamed Tarek , February 24, 2013 at 3 a.m.:

I'm an undergraduate at faculty of engineering Ain-Shams University in Egypt ,studying MEMS, Optoelectronics . Most spectacular"Walter Lewin Style ^___^ " videos i've ever seen ... maybe one day i'll come to MIT and teach , who knows :)

Comment79 Jean-Georges Roche, April 6, 2013 at 3:02 p.m.:

Certainly the best way to learn is to take pleasure. I've learn most of things you teach but now i really understand. Thank you for this.

Comment80 ramesh kumar, April 13, 2013 at 4:13 p.m.:

every video nice and physics works true.......

Comment81 Thangadurai Ganesan, June 28, 2013 at 6:07 a.m.:

Prof.Watlter Levin ............ Physics works....

Comment82 Simran Gupta, September 22, 2013 at 3:50 p.m.:

Respected sir
Thank you very much sir for your excellent lectures. I really needed these lectures. I love physics but had no source to understand it better. Sir I'm grateful to you. It was absolutely remarkable!
Best wishes.


Comment83 Arjun , August 3, 2014 at 8:31 p.m.:

The best teacher of Physics that I have seen in my life :)

Comment84 Francois Jooste, September 30, 2014 at 11:23 a.m.:

I want to thank the person who organised this project and all the lecturers participating in it for providing knowledge to the world without the intentions of profit or self gain.

When I first found out about these lectures my heart melted, because I don't have access to higher education. I might not ever get a degree, doctorate, phd or any kind of recognition for the knowledge that has been provided by MIT. However I don't need a fancy piece of paper to say something about me. All I ever cared about was the knowledge and here at the tips of my fingers its available.

To be able to have some kind of understanding about how our world functions and the intellectual tools to help me explore this amazing universe we all live in. What more could I ever ask for?

Thank you to everybody participating in this project for making it possible. Not just for me, but for anybody who has a desire to learn. Not just physics, but a entire range of subjects at MIT.

It makes me happy to think that knowledge is being shared with anybody that is interested. Not just because of what it means to me, but what it could mean to future generations.

I salute you all with my utmost respect.

Comment85 Adil, October 13, 2014 at 3:10 p.m.:

Sir i have no words to express your intellet.your way of teaching is best.i like the attitude and welcome your efforts.

Comment86 Kalyankar Madan Mohan Rao, November 25, 2014 at 2:35 p.m.:

Sir, You are great. Some where I found your video on internet. I tried and tried and found the bunch of your lectures at MIT Open Course. I'm very thankful to MIT for this great job.
I request you to raise number of videos download per day. And if possible provide good quality for videos that we download.

- Kalyankar Madan Mohan Rao
Sree Visvesvaraya Institute of Technology and science,Mahabubnagar, Telangana, India.
(Jawaharlal Nehru Technological University Hyderabad,India.)

Comment87 Aslam Hameed, January 5, 2015 at 10:31 a.m.:

Respected sir can u send me video lectures on classical mechanics

Comment88 imran khan, January 28, 2015 at 2:22 p.m.:

PLZ read the books , videos lectures are just original photocopies of something else ,learning is in books not in AMERICA .

Comment89 Muhammad Jehanzeib Khokhar, January 30, 2015 at 6:42 a.m.:

I love Walter H. G. Lewin .He is a very good teacher.I love his all Lecture , style of teaching , and the way he interact with students.

Its my dream to meet him and shake hand with him.

Comment90 ubaid ullah, March 23, 2015 at 8:23 a.m.:

prof lewin lectures and concepts are awesome. I listen prof lectures for concepts, to have fun and to create curiosity of research.

Comment91 Richard Reddy, May 28, 2015 at 3:35 p.m.:

I took this course on edX. Quite a blast of physics!

Comment92 sunil chawala, October 24, 2015 at 4:24 a.m.:

very nice for giving lectures

Comment93 SOORYA, December 5, 2015 at 4:30 p.m.:


Comment94 Paweł Kreczmański, December 9, 2015 at 1:17 p.m.:

A true talent of teaching.
This is beutiful physics is beautiful!!
Thank you!!!
For sharing this passion!!

Pawel, Warsaw, Poland.

Comment95 sachin narula, February 12, 2016 at 3:48 p.m.:

Respected sir can you please tell me how we can physically prove E = mc²

Comment96 ADITYA PRATAP SINGH, August 28, 2016 at 5:32 p.m.:

Sir you change my view toward science especially toward physics and space and time. Thanks to you and your valuable lectures and their references.

Sir I want to know how may I get a chance to be a student of MIT to study and do my research.

Please give me a reply Sir

Comment97 haggai, October 23, 2016 at 4:02 a.m.:

Great lectures

Comment98 Edson de Melo-Holzgreve, December 26, 2016 at 11:49 p.m.:

Beste Prof Lewin,

heel bedankt voor de leuke college.

Comment99 VIRENDRA MEHTA, June 7, 2017 at 7:37 p.m.:

Sir your lecture is really great , thank you for that . I'm from India. I down lode your lecture and share with my friends.

Comment100 Bako Alhaji Shuaibu, July 17, 2017 at 7:52 a.m.:

Excellent Professor

Comment101 Todd Mueller, January 13, 2021 at 4:09 a.m.:

Great post! We'll be sharing this with our buddies in Bakersfield, CA.

Thanks! - Todd, owner of

Comment102 Amey pathak, April 17, 2021 at 5:25 a.m.:

Best teacher

Comment103 Lisa06, August 30, 2023 at 6:28 p.m.:

good site <a href=""></a>

Comment104 Lisa689, August 30, 2023 at 6:29 p.m.:

good [url=][/url]

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