1. The problem statement, all variables and given/known data A standard man holds an object of mass m = 3 kg on the palm of the hand with the arm stretched, as shown in the figure below. (a) Use the torque equilibrium equation to determine the magnitude of the force F that is exerted by the biceps muscle, when a = 32 cm,b = 6 cm,and the angle θ = 75°.Neglect the weight of the lower arm. (b) Is the assumption of a negligible mass of the lower arm in part (a) justified? 2. Relevant equations 3. The attempt at a solution Part a) I completed with little difficulty, I wish only some dialogue on the second part. The way I see it is that even if the man were not holding a mass in his hand, the weight of the lower arm itself would still exert some force on the bicep. Therefore, the mass is not in fact negligible. Any thoughts?