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Question: 

Suppose the point of insertion of the biceps muscle into the lower arm shown in Fig. 9–13a (Example 9–8) is 6.0 cm instead of 5.0 cm; how much mass could the person hold with a muscle exertion of 450 N?

Example 9–8, forces on forearm.

Problem 9-52 Example 9–8, forces on forearm.

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

Quick Answer: 

$7.0 \textrm{ kg}$

Giancoli 7th Edition, Chapter 9, Problem 31

(2:20)

Chapter 9, Problem 31 is solved.

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