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).

It's the start of a new school year for many students, and everyone, including the faculty, needs to get ready for some tough classes—especially while dealing with Covid-19. Although I've only been ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. When you take a look at the Universe in great detail, a few facts jump ...