Block & Tackle Pulley System

Block & Tackle Pulley System

A block and tackle or only tackle is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift heavy loads. The pulleys are assembled to form blocks and then blocks are paired so that one is fixed and one moves with the load.


A block and tackle pulley system is a type of mechanical device that uses multiple pulleys to increase the mechanical advantage of lifting heavy loads. It consists of a set of two or more pulleys, arranged in a fixed or movable block, and a rope or cable that runs through the pulleys.

The basic principle behind a block and tackle pulley system is that by increasing the number of pulleys, the force required to lift a heavy object can be reduced. As the rope is pulled through the pulleys, the mechanical advantage increases, making it easier to lift the load.

Block and tackle pulley systems are commonly used in physics experiments to demonstrate the principles of work, force, and mechanical advantage. They are also used in various industrial applications, such as construction, transportation, and manufacturing.