College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 8 - Problems - Page 314: 43


$F_s = 637~N$

Work Step by Step

The force exerted by the sacrum on the spine is equal in magnitude to the sum of the upper body weight and the weight of the package. We can find $F_s$: $F_s = (M+m)~g$ $F_s = (55~kg+10~kg)(9.80~m/s^2)$ $F_s = 637~N$
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