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Simple machine, any of several devices with few or no moving parts that are used to modify motion and force in order to perform work. The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley, and screw.

Simple Machines are basic mechanical devices for applying a force and doing work. More complex machines are made up of a bunch of simple machines.

Machines are all around us. A machine is something that makes it easier for us to do work such as moving heavy objects.

The simple machines that changed the world throughout history.