For the next two questions, consider the following model of an arm supporting a weight: tendon 1 biceps Lo Stress Is defined Zo tendon 2 ForceA d d2 A biceps muscle originates from the shoulder via tendon 1. It inserts into the lower arm via tendon 2. In its relaxed state, the biceps has a length LO = 197 mm, and each of the tendons have an unstretched length z0 = 23 mm and a diameter of 8 mm. Question 7 (1 point) Retake question Listen Consider when a mass m1 = 20 kg is placed in the person's hand. The lower arm of mass m2 = 5.4 kg is of length d2 = 244 mm, and its centre of mass is located a distance d2/2 from the elbow. What is the force exerted by the biceps if tendon 2 inserts into the lower arm a distance d1 = 23 mm from the elbow? Hint: Set the elbow as the pivot and apply conditions of static equilibrium. Your Answer: 2362 ,4 N. 3 4 - 8 - To exer This force, The bicept must contract, which in turn stretches both tendons. If the person's arm does not move when The weight Answer is placed in the hand Lie. The total length of the tendons and This muscle, Lot 2zo, remains constant), calculate The magnitude of the change in length of biceps if the tenders have a young's Modulus of 250 MPA, Report the answer in units of mm and round D the nearest tenths place Hint, The two tenders a biceps are functionally in series, so each wuth feel the same force