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Get Full Access to University Physics - 13 Edition - Chapter 11 - Problem 23e
Get Full Access to University Physics - 13 Edition - Chapter 11 - Problem 23e

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# BIO Neck Muscles. A student bends her head at 40.0° from ISBN: 9780321675460 31

## Solution for problem 23E Chapter 11

University Physics | 13th Edition

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Problem 23E

BIO Neck Muscles. A student bends her head at 40.0° from the vertical while intently reading her physics book, pivoting the head around the upper vertebra (point P in ?Fig. E11.23?). Her head has a mass of 4.50 kg (which is typical), and its center of mass is 11.0 cm from the pivot point P. Her neck muscles are 1.50 cm from point P, as measured ?perpendicular to these muscles. The neck itself and the vertebrae are held vertical. (a) Draw a free-body diagram of the student’s head. (b) Find the tension in her neck muscles.

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Solution to 23E Step 1 of 3 Free body diagram

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