A movable pulley is a pulley the place when you move a large object, the drum moves with it. There is no alter in the route of the drive you require to implement, but the load will “feel” lighter than it truly is. For example, if you’re hauling a large hay bale up the barn’s attic, a moveable pulley will make the load come to feel a good deal lighter, even though you happen to be pulling in the identical course.