WALTER LEWIN: Now I can, of course, overdo things. I can take a spring like this one and stretch it to the point that it no longer behaves like Hooke's law. I can damage it. I can do permanent...
PROFESSOR: Being able to draw good force diagrams is one of the most important skills that you need to do well in this course. Force diagrams, or free body diagrams, are diagrams that show the body in...
WALTER LEWIN: If you look at the location t3 and t2 and I bring t3 closer and closer to t2, then this angle of alpha will increase. And I can go to the extreme that I bring t3 almost right at t2. The...
If you're now suffering from acne, I can relate, and I have some good news for you. I've discovered some information that guarantees to eliminate acne in just 24 hours. I'd...
SHIRLEY GAW: Hi. My name is Shirley, and I'm a software engineer working in the Paris office, and I'm on the YouTube Data API team. PHILIPP PFEIFFENBERGER: And I'm Philipp...
So let me guess; when you were little everyone was always asking you "What do you want to be when you grow up?" And if you were anything like me you probably said a veterinarian or a...
My name is Robert Shand and I am a businessman. What was your first reaction to the movie? I was really inspired by it, and I was surprised at myself that at being inspired because I didn’t know...
WALTER LEWIN: It's very general. I have a rope, and the rope is wrapped around an object, which could be a disk. Let's call this point Q here. Let's call this point P. This is...

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