For experimentally verifying the laws of triangle, parallelogram and polygon of forces Comprising of a equal circular 40 cm, dia aluminium disc, graduated into 360 divisions (degree), complete with levelling screws, clamping device to fix the table at any desired angel, five sliding clamp pulleys, central ring, string and five sets of iron nickelled slotted weights, each set containing nine weights and one hanger of 50 gm.

A wooden board of 50x60 cm with wall brackets, two frictionless clamp pulleys, and three set of slotted weights of iron nickeled each set containing nine weight and one hanger of 50 gms.

A teak wooden right angled lever with fulcrum at the angle, the horizontal arm is of 75 cm and vertical arm is of 20 cm, a brass spring balance with adjustable wing nut is attached to the shorter arm. The lever arm is with scale and grooved at every 5 cm complete with one sliding weight of 1 Kg.

Simply supported beam for span 1.0 m - consisting of two compression thrust type 10 Kg tubular spring balances fixed on wooden polished board, a wooden bar with steel back plate. Completed with stirrups, hooks and two 1 Kg weights.

It consists of a 15x 60 cm wooden board a with glass top hinged on an iron base to which a sector with graduated arc and vertical scale is provided. The plane may be clamped at any angle.

comprising of Carefully machined and balanced cast iron wheel and the steel spindle in support on ball bearing in strong iron brackets. The wheel is smoothly painted black and is marked with a line. A pointer is fixed to one of the brackets. Diametric hole is drilled in the shaft to take a pin and cord. The base is provided with holes so that the apparatus can be fixed to wall.

Winch crab single purchase- Fitted with heavy cast iron wall brackets The grooved wheel is of 25 cm dia.and gears are machine cut.

Winch crab Double purchase- Same as above but with double set of gearing arrangement.