When a force (effort force) is applied over a distance..

Consists of two circular objects: a central shaft inserted through the middle of a wheel.

One inclined plane or two back-to-back inclined planes that can move. (knife blades or nails)

A device that helps reduce the amount of force required to do work.

Inclined planes that are wound around a post or cylinder.

A grooved wheel with a rope running along the groove.

A rigid bar or board that is free to move around a fixed point called a fulcrum.

A sloping surface, like a ramp, that reduces the amount of force required to lift an object.

Also known as compound machines, consist of two or more simple machines.

The amount of energy put into work.

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