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Question: 

Approximately what magnitude force, $F_M$, must the extensor muscle in the upper arm exert on the lower arm to hold a 7.3-kg shot put (Fig. 9–71)? Assume the lower arm has a mass of 2.3 kg and its CG is 12.0 cm from the elbow-joint pivot.

Problem 32.

Figure 9-71.

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 

$970 \textrm{ N}$

Giancoli 7th Edition, Chapter 9, Problem 32

(1:42)

Chapter 9, Problem 32 is solved.

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