# ⓘ Simple machine. A simple machine is a device that can change the direction or the magnitude of a force, or the point where it is applied. This is done so that t ..

## Wedge

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## ⓘ Simple machine

A simple machine is a device that can change the direction or the magnitude of a force, or the point where it is applied. This is done so that the force can be used to do work. All mechanical machines are made by combining simple machines.

There are six basic "simple machines", as defined by Renaissance scientists:

• The wedge
• The pulley changes the point where a force is applied, and may also change its magnitude and direction.
• The wheel change the direction in which the force is applied.
• The screw that converts rotational motion to linear motion, and a rotational force to a linear force.
• The inclined plane
• The lever also called a rope or staff can move the point at which a force is applied and may also change the magnitude and direction of the force.

The use of simple machines can be traced back to homo habilis the first humans to use tools, but certain animals other than man also use them.

A compound machine is made up of two or more simple machines.

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