J11.01.49 Inclined Plane Friction Apparatus. This device is used 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 degree. A hanging pan is provided to hold the desired weight. Two wooden boards with different sizes 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. Size 26x15x40cm. Instruction manual included.