Basic Biomechanics 5th Edition by Susan Hall

Exercise 2

How much tension (F m ) must be supplied by the triceps to stabilize the arm against an external force (F e ) of 200 N, given d m = 2 cm and d e = 25 cm? What is the magnitude of the joint reaction force (R)? (Since the forearm is vertical, its weight does not produce torque at the elbow.)