This apparatus demonstrates the relationship between moment of force, the amount of force and the length of the lever arm.By simply adjusting weights fitted on a meter stick lever to establish equilibrium, students will observe the law of torque for various centres of rotation, compare clockwise and counter-clockwise torques, measure various lever arms, and calculate torque.Equipment consists of a meter stick, three knife edge clamps and an aluminium support.Supplied with 100g & 200g hooked weight.