The Archimedes screw, an ancient Greek invention for lifting water. Learn about its origins, how it works, and its modern ...

A simple machine is a tool that helps us do work. They use clever shapes to help us move, lift, cut and other types of work. Learn more about the inclined plane, the pulley, the lever, the wheel and ...

Lesson that teaches children what screws are and what they do. Gain a deeper understanding of what screws are by making your own in this interactive lesson. Usage conditions apply ...

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.