Professor Walter Lewin demonstrating the two normal modes of a coupled pendulum. This demonstration can be viewed on the video of Lecture 5. (Image courtesy of Markos Hankin, MIT Physics Department Lecture Demonstration Group.)
MIT OpenCourseWare makes the materials used in the teaching of almost all of MIT's subjects available on the Web, free of charge. With more than 2,000 courses available, OCW is delivering on the promise of open sharing of knowledge.