The top figure shows a diagram of the bones and biceps muscle of a person's arm supporting a mass. The lower figure shows a biomechanical model of the arm, in which the biceps muscle AB is represented by a bar with pin supports. The suspended mass is m = 2 kg, and the weight of the forearm is 9 N. If the cross-sectional area of the tendon connecting the biceps to the forearm at A is 28 mm2, what is the average normal stress in the tendon? If the largest safe stress for the tendon is 10 MPa, what is the largest suspended mass that can be supported?
