To verify the laws of triangle, parallelogram and polygon of forces. Heavy aluminium
casted top disc, 40 cm. diameter is accurately turned and graduated in degrees. It is provided with 4 frictionless
adjustable
pulleys having pivots of hardened steel, cords from central ring carries hangers for slotted weights.
Pulley clamps have an
index to show direction of forces. The base is of heavy cast iron with levelling screws and
vertical rod is nicely polished
supplied complete with 4 mass hangers and 12 masses (2 x 10 g, 2 x 20 g, 4 x 50 g, 4
x 100 gm).
