This apparatus is designed to demonstrate the equilibrium of moment of two arm lever. Moment occurring at the both ends of the lever is balanced by applying load at different distances from the central pivoted point.
In this apparatus beam is centrally mounted by the vertically support so this beam act as two arm lever. Lever is scaled and riding weights are provided at both ends of the lever. Equilibrium is achieved by applying load on both side of the arms and adjusting their distance from mean position.