This instrument has been designed to study concepts of motion on an inclined surface and its relationship to the friction. All metal construction provides sturdiness and durability to this apparatus. It is made of polished hardwood board hinged at one end to wooden base board. A pulley in U-bracket is mounted on the other end of inclined plane supports masses suspended from the thread with other end tied to the object under observation. The index pointer fixed to the inclined surface moves along the arc scale attached to the baseboard and gives its angle of inclination. Includes two wooden block sliders for friction experiments, one metal roller in bracket with hook, and one weight pan with lightweight cord for suspension