Problems 1. A woman is holding her hand and forearm out 90 degrees at her elbow from her . Her hand and forearm weigh 35 N and their combined center of gravity is 15 centimeters from her elbow joint center. Her bicep tendon is attached to her forearm 3 cm from her elbow joint. a) How much force must her bicep exert in order to maintain this position? b) How much force must her bicep exert if she holds a 50 N weight in her hand? Her hand is 25 cm from her elbow joint center. 2. What is the force required to produce a 20 N-m torque when the force is applied at an angle of 50 degrees at the end of a 300 cm rod? 3. An 80 kg person is standing on a light, rigid, 3 meter plank that is resting on two scales, one on each end. The person is standing 1 meter from the left scale. What is the reading in kg of each scale? -1m > 3 meters