A movable pulley is a pulley in which when you shift a weighty object, the drum moves with it. There is no adjust in the route of the power you need to utilize, but the load will “really feel” lighter than it truly is. For illustration, if you’re hauling a large hay bale up the barn’s attic, a moveable pulley will make the load really feel a lot lighter, even though you’re pulling in the exact same course.