The term "pulley" refers to a classic simple machine consisting of a grooved wheel mounted on an axle or shaft, designed to support movement and change the direction of a taut cable, rope, or belt along its circumference. In mechanical engineering and physics, pulleys are classified by their ability to redirect force and create mechanical advantage. Beyond technical mechanics, the word represents any system where a flexible band loops over a rotating wheel to transmit power, redirect tension, or facilitate smooth lifting operations across domestic appliances, vehicles, and industrial machinery.
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