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Question: 

Redo Example 9–9, assuming now that the person is less bent over so that the $30 ^\circ$ in Fig. 9–14b is instead $45 ^\circ$. What will be the magnitude of $F_V$ on the vertebra?

Forces on the back exerted by the back muscles (F_M) and by the vertebrae (F_V) when a person bends over.

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

Quick Answer: 

$2.4w$

Giancoli 7th Edition, Chapter 9, Problem 33

(8:36)

Chapter 9, Problem 33 is solved.

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