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).

Ask someone to list the greatest inventions and discoveries of all time, and they are likely to come up with such things as fire, the wheel, electricity, and perhaps penicillin. In my mind, however, ...

One of the many awesome things about physics is you can study it anywhere. I’ll prove it with a fun problem that involves a cart and a ball. Not just any cart, but a cart that rolls along a table and ...