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Use this device to study the friction between two surfaces and the forces on an inclined plane. The inclined board can be set at any angle between 0° and 45°. A hanging pan is provided to hold the desired weight. Three different-sized boards with eye hooks and a metal plate are included. Students can determine the coefficient of static friction and the coefficient of sliding friction and verify the normal and frictional components of the force exerted by the plane. Activity manual included. 26 x 15 x 4.