Number of rope segments of shower room pulley bearing weight
Let n be the number of Shower room pulley bearing rope segments bearing the weight (for example, the pulley block on the left above is n = 5 and the pulley block on the right is n = 4), then the n-segment rope can be equipped with N or n-1 pulleys. When equipped with n wheels, the number of moving pulleys and fixed pulleys is equal, and the rope is fixed on the fixed pulley; When equipped with n-1 pulleys, n is an odd number, and the fixed end of the rope is on the movable pulley.
When using the pulley block, the weight is borne by several ropes, and the force used to lift the object is a fraction of the weight.
characteristic
The pulley block uses several pieces of rope to hang the object, and the force used to lift the object is a fraction of the total weight If the free end of the rope bypasses the movable pulley, it will be counted as a section, while if it bypasses the fixed pulley, it will not be counted. Although the use of pulley block saves effort, it costs distance. The distance of power movement is greater than that of heavy objects The cost of distance mainly depends on the number of rope sections of the fixed pulley. It is easy to see from the experiment with the pulley block that although the use of the pulley block saves labor, it costs Shower room pulley bearing distance - the distance of power movement is greater than the distance of goods lifting.
