It is used for study of frictionless motion, elastic and inelastic collisions, velocity, acceleration, conservation of momentum etc. Triangular section aluminium alloy track, length 200cm, with two rows of air holes through which air emerge forming air cushion on which the vehicles float. The vehicles show linear motion under virtually frictionless condition. Supported on three adjustable feet. At one end of track an air inlet tube connection is given. Supplied without accessories.