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Consider a gymnast performing the "iron cross" on the rings. what magnitude of moment must be produced at each shoulder joint to maintain this position? assume the weight of an arm acts at a point one-half the length of the arm. let the mass of the gymnast be 80 kg, arm weight be 5 kg, length of arm be 1 m, and gravity be 10 m/s2 . (
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Consider a gymnast performing the "iron cross" on the rings. what magnitude of moment must be produc...
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