Simple machines

A simple machine is a machine that will work with only one exertion of force (only one movement). Simple machines are the basis of all of all other more complex machines.

The simple machines are:

Lever

Pulley

Wheel and Axle

Inclined Plane

Screw and Wedge

Each of these machine is actually a variation of one of the two basic simple machines: the lever and the inclined plane.

All machines multiply the effort force put into it, which allows machines to make work easier. This is called the mechanical advantage.