Triangle Of Forces Apparatus

A bench mounted circular table with a central pin and 360º protractor has three pulleys on adjustable clamps round the edge. 
The triangle of forces in equilibrium can be constructed and the resultant of two known forces can be found.
Conditions of equilibrium are obtained by centralising a small cord ring over the central pin with cords to load hangers where the loads and lines of action are variable.

Triangle Of Forces Apparatus