Students can determine the coefficient of static friction and the coefficient of sliding friction as well as verify the normal and frictional components of the force exerted by the plane. The wooden inclined plane can be set at any angle between 0 and 45° on the metal protractor. Set includes 2 wooden boards of different sizes, a metal plate, weight pan, pulley, string, and instructions. Dimensions, 26 × 4″; wt, 4 lb.