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 ...

Gears keep the world moving. Available in a variety of shapes and made from a wide range of materials, gears are found absolutely everywhere. From the tiniest and most delicate gears used by ...

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 ...

Minuscule gears that are thinner than a human hair and powered by light could be used to study human cells or power tiny, complex robots. Gear systems often struggle to work at a size below a tenth of ...