LEVER KIT To provide a simple ‘See-Saw’ for experiments on balancing masses, leading to the principle of the lever. Also to show that there is no net change in energy in the moving masses. Comprises 5 wood beams, approximately 610 x 44mm graduated at 38mm intervals, 4 “U” shaped supports, grooved to locate fulcrum pins, 40 brass ‘pennyweights’, 25 x 25 x 2mm and 20 fulcrum pins for insertion into edge of beam. Qty :