TOPIC: CENTER OF GRAVITY AND 2ND CONDITION OF EQUILIBRIUM

1. What happens to the center of gravity of a person under the following situations? a) His upper right extremity is amputated. b) He carries all his books using the right arm only.
2. If 25 kg is the maximum mass m that a person can hold in a hand when the arm is positioned with a 105 angle at the elbow as shown in the figure below, what is the maximum force, FM, that the biceps muscle exerts on the forearm? Assume the forearm and hand have a total mass of 2.0 kg with a CG that is 15 cm from the elbow, and that the biceps muscle attaches 5.0 cm from the elbow.