Elements of the lower arm are shown in the figure. The weight of the forearm is 6.9 lb with mass center at G. Determine the combined moment about the elbow pivot O of the weights of the forearm and the sphere. What must the biceps tension force be so that the overall moment about O is zero? The moment is positive if counterclockwise, negative if clockwise. 2" T 60° 5.4" Answers: 6.9 lb G 12.1" 7.8 lb Mo= i Ib-in. T = i lb

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