18. Our system consists of the lower arm holding a bowling ball. As shown in the free-body diagram, the forces on the lower arm consist of TGfrom the biceps muscle, FGfrom the bone of the upper arm, and the gravitational forces, mgGand MgG. Since the system is in static equilibrium, the net force acting on the system is zero: net,0()yFTF mMg==−−+¦In addition, the net torque about O must also vanish: net)()(0)()()()OdTF Dm
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.