3. Given the Free Body Diagrams and assumptions below, calculate the joint contact force in the left shoulder. Assume: Can be solved in 2-D, Climber is static and rigid. The

magnitude of the force acting on the right hand is 773 N. The deltoid is the only active muscle crossing the left shoulder joint, acts 10 degrees from the humerus and inserts 10 cm from the shoulder. The left arm is 5% of the body mass and of negligible thickness.