Pulley

A pulley is a simple machine consisting of a wheel with a groove around its edge, through which a rope or cable runs. It helps change the direction of a force applied to lift or move heavy objects, making tasks easier. By using one or multiple pulleys, the effort needed to lift a load can be reduced, often distributing weight more efficiently. Pulley systems are common in cranes, elevators, and other machinery where heavy lifting is required, providing mechanical advantage and enhancing safety and efficiency in moving loads.