Newton’s laws (and string tension)

What is string tension? Where does it come from? String tension can be difficult to comprehend at first sight. Here is an example from a class given by Prof. Walter Lewin at MIT (course 8.01, Physics I: Classical Mechanics, fall 1999). The lectures covers Newton’s laws. String tension explained at 31:11, with a fun experiment at 43:00.

Topics covered in this lecture:

Newton’s laws — string tension