Thus, less effort will be required to lift the job.

In a particular time, if the wheel rotates by angle q, the distance moved by the effort will be and by the load

Hence,

Pulley System

A systematic arrangement of one or more pulleys may provide a simple and convenient lifting machine. In its simplest form it consists only one pulley over which a rope or chain passes. In this case velocity ratio is equal to unity since distance moved by effort is equal to the distance moved by the load.