Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 7 - Exercises and Problems: 48

Answer

Please see the work below.

Work Step by Step

We know that $U=7.0-8.0x+1.7x^2=3.5$ $\implies 1.7x^2-8.0x+3.5=0$ After solving for x, we obtain: $x=\frac{8.0\pm\sqrt{(8.0)^2-4(1.7)(3.5)}}{2(1.7)}$ $x=0.49m$ $x=0.42m$
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