A movable pulley is a type of pulley system that can move with the load it is lifting. It consists of a wheel that is attached to a support and a rope that runs through the wheel. When you pull down on one side of the rope, the wheel moves up, making it easier to lift heavy objects. This design reduces the amount of force needed to lift the load. Movable pulleys are often used in various applications, such as construction and shipping, to help lift and move heavy items. They are part of the larger category of simple machines, which also includes fixed pulleys, levers, and inclined planes. By using a movable pulley, workers can increase their efficiency and safety when handling heavy materials.