When holding the stone of weight W in equilibrium, the humerus H, assumed to be smooth, exerts

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When holding the stone of weight W in equilibrium, the humerus H, assumed to be smooth, exerts normal forces FC and FA on the radius C and ulna A as shown. Determine these forces and the force FB that the biceps B exerts on the radius for equilibrium. The stone has a center of mass at G. Neglect the weight of the arm.


Given:

W = 5 lb

θ = 75 deg

a = 2 in

b = 0.8 in

c = 14 in

Fg Fe


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