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Question: 

If 25 kg is the maximum mass $m$ that a person can hold in a hand when the arm is positioned with a $105 ^\circ$ angle at the elbow as shown in Fig. 9–74, what is the maximum force $F_{max}$ that the biceps muscle exerts on the forearm? Assume the forearm and hand have a total mass of 2.0 kg with a CG that is 15 cm from the elbow, and that the biceps muscle attaches 5.0 cm from the elbow.

Problem 37.

Figure 9-74.

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

Quick Answer: 

$1800 \textrm{ N}$

Giancoli 7th Edition, Chapter 9, Problem 37

(2:22)

Chapter 9, Problem 37 is solved.

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