For experimentally verifying the laws of triangle, parallelogram and polygon of forces. Comprising of a circular 40 cm. diameter aluminum disc, graduated into 360 degrees. Complete with leveling screws, clamping device to fix the table at any desired angle, five sliding clamp pulleys, central ring, string and five sets of iron nickelled slotted weights, each set containing nine slotted weights and one hanger of 50 gms each.