Characteristics of pulleys

The pulley block uses several ropes to suspend the object, and the force used to lift the object is a fraction of the total weight. The free end of the rope goes around the moving pulley and counts as one part, while the one that goes around the fixed pulley does not count. Although the use of the pulley group saves effort, it takes a distance. The distance of the power movement is greater than the distance of the heavy object. The amount of the distance depends on the number of rope segments of the pulley. Experiment with the pulley group, it is easy to see that the use of the pulley group although It saves effort, but it takes a distance-the distance that the power moves is greater than the distance that the cargo rises.