MIT Professor Walter Lewin, Physics, Classical Mechanics, Lecture No. 08: Friction
This lecture deals exclusively with frictional forces.
Prof. Lewin demonstrates a strange experiment, where a flea is moving a thick book.
via Yovisto / Osotis
MIT Professor Walter Lewin, Physics, Classical Mechanics, Lecture No. 06: Newton's Laws
This lecture is all about Newton's First (inertia), Second (F=ma) and Third (action=-reaction) Laws.
via Yovisto / Osotis