Occasionally there are physics lab demonstrations that I think are pretty awesome but that my students just think are "meh." This is one of those cases. The basic idea in this demo, which I used in my ...

Researchers found increasing string tension placed greater load on the elbow Tennis elbow could be avoided by reducing the tension on racquet strings, according to Dundee University researchers. The ...

This is a classic introductory physics problem. Basically, you have a cart on a frictionless track (call this m 1) with a string that runs over a pulley to another mass hanging below (call this m 2).