an athlete at the gym holds a 4.0 kgkg steel ball in his hand. his arm is 70 cmcm long and has a mass of 4.0 kgkg with the center of gravity 30 cmcm from the shoulder.for the steps and strategies involved in solving a similar problem, you may view a video tutor solution.part awhat is the magnitude of the gravitational torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?express your answer with the appropriate units.
