· · · · · · Constructed as a wooden right-angled lever with the fulcrum positioned at the vertex. Horizontal arm length: 75 cm Vertical arm length: 20 cm The lever is marked with a scale grooved at every 5 cm for precise measurement of force application points. A spring balance is attached to the shorter (vertical) arm and comes with an adjustable wing nut for calibration and position adjustment. The apparatus includes one no. 1 kg sliding weight for applying force on the horizontal arm.