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Simple Machines

Work

A force moving an object over a distance.

Force

A push or a pull.

Simple machine

A device that makes work easier and that has few or no moving parts.

Inclined plane

A simple machine that consists of a straight, slanted surface.

Wedge

A simple machine made up of two inclined planes placed back to back.

Screw

A simple machine consisting of an inclined plane wrapped around a cylinder.

Lever

A simple machine made up of a bar that pivots at a fixed point called a fulcrum.

Wheel and axle

A simple machine that consists of two connected cylindrical objects of different diameters.

Pulley

A simple machine that consists of a rope wrapped around a wheel.

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