Spark image
The forearm as a lever

The pivot (or fulcrum) is at the elbow joint, the load is held in the hand and the effort is applied in the biceps muscle. In the arrangement shown the forearm is horizontal and the force in the biceps muscle acts vertically. (N.B – the blue force lines represent the direction of the forces and NOT their relative magnitude)

 
 
 
© Keith Gibbs 2010