The Equilibrium of Parallel Forces are produced with cords tensioned by weights on hangers, double pulleys being used to turn the upward forces downward. A Equilibrium of Parallel Forces board is clamped into the Universal Frame and Stand Two acrylic models engraved to simulate a 'Warren' and an 'N' truss are used for the application of vertical loads and reactions. The lines of action of the cords can be transferred onto a sheet of paper clipped to the force board. The set of weights needed for the experiment is included. A circular disc with twelve attachment points is used for the couples. To simplify the results each acrylic model has a counterbalancing weight to render each one 'weightless'.
Experimental Capabilities:
Special case where equal and opposite parallel forces produce a couple acting on a body
Equilibrium of opposing couples
Verify the conditions of equilibrium when sets of parallel forces act in one plane on a rigid body
Experimental verification of the use of a link polygon and is a test of M = 0 (where M = moments)
Fv = 0 (where F = forces and V = vertical).
