## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson

# Chapter 9 - Work and Kinetic Energy - Exercises and Problems - Page 228: 26

#### Answer

The spring constant is 360 N/m

#### Work Step by Step

When the book is placed on the spring, the spring is compressed by 6 cm. The force that the spring pushes is equal to the weight of the book. Therefore; $kx = mg$ $k = \frac{mg}{x}$ $k = \frac{(2.2~kg)(9.80~m/s^2)}{0.060~m}$ $k = 360~N/m$ The spring constant is 360 N/m.

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