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).

Physics, especially the part about forces and motion, often feels like a maze of confusing concepts and formulas. If you’ve ever stared at a problem about an object moving or a force acting and ...

No measurement can be simpler than the counting of ticks, making frequency — and hence time — the most accurately measurable quantity. To establish a reference tick rate, people have always been ...