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A simple machine is a mechanical device that allows you to trade force for distance, meaning that you can use a smaller force applied over a longer distance to lift a heavier object, which is applied over a shorter distance. This is known as the principle of mechanical advantage. The effort and load are the two main components of a simple machine and the effort arm is longer than the load arm that help to lift.

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The Pulley System makes use of a disk-shaped block that a rope wrapped around to create a simple machine. The force that is applied on one side of the rope uses the pulley system to divert the force in a different direction. Pulleys are used to lift heavy objects.
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