Repeat Problem 4, this time plotting forces FA, FB, and FC over the same range of angles u.
Problem 4 Problem 4.5
A 160-lb person is holding a 10-lb weight in his palm with the elbow fixed at 908 flexion (Fig. 4.8, top).
(a) What force must the biceps generate to hold the forearm in static equilibrium?
(b) What force(s) does the forearm exert on the humerus?
