This apparatus is designed to study the performance of wheel and axle mechanism. This mechanism is used to lift the heavy loads with comparatively less effort.
The unit consists of two pulleys of different diameters. The pulley with larger diameter is termed as wheel and the other one is called axle. Both pulleys are fixed on same rod which is supported at its ends via bearings. Load is applied on axle with the help of cord and the effort force is applied on wheel to lift the load with the cord which has hanger and weights on its free end.