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A Single Movable Pulley and Mechanical Advantage
A pulley is a mechanical device that can be used to lift heavily objects more easily. Pulleys consist of a wheel that rotates on an Axle—which is a rod through the centre of the wheel—and a rope, cable, or chain. There are three main types of pulleys: Fixed, Movable, and Compound.
A Fixed pulley’s wheel and axle stay in one place. A good example of a fixed pulley is a flag pole: When you pull down on the rope, the direction of force is redirected by the pulley, and you raise the flag.
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