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Approximately what magnitude force, FM, must the extensor
Chapter 3, Problem 31P(choose chapter or problem)
Problem 31P
Approximately what magnitude force, FM, 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 its CG is 12 cm from the elbow-joint pivot.
FIGURE 9–64
Questions & Answers
QUESTION:
Problem 31P
Approximately what magnitude force, FM, 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 its CG is 12 cm from the elbow-joint pivot.
FIGURE 9–64
ANSWER:
Step 1 of 2
Given,
The mass of the shot put, 
The mass of the lower arm, 
The distance between the CG of the lower arm and the pivot point, 
The distance between the extensor muscle and the pivot point, 
The distance between the pivot point and the shot put, 