Pulley

 

A pulley is a simple machine consisting of a wheel with a groove around its rim, used to change the direction of a force applied to a rope or cable. It can also be used to amplify the force applied, making it easier to lift heavy objects.

Pulleys are commonly used in various applications, including construction, sailing, and weightlifting. By utilizing a system of pulleys, known as a block and tackle, it’s possible to significantly reduce the amount of effort required to lift heavy loads.

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