Approximately what magnitude force.F\\.must the extensor
Chapter 9, Problem 31(choose chapter or problem)
Approximately what magnitude force.F\\.must the extensor muscle in the upper arm exert on the lower arm to hold a 7.3-kg shot put (Fig. 9-64)? Assume the lower arm has a mass of 2.8 kg and itscgis 12cm from the elbow-joint pivot.
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