When you push or pull with a simple machine, you are applying a force and doing work. And, if you get more force out of a machine than you put into it, then that machine has a mechanical advantage.

A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called ...

Lee Trevino, one of the best shot makers in the history of golf, showed one of the worst ways to hit one of the shortest shots. Trevino took his club back, then, in a quick, exaggerated motion, only ...