Essential University Physics: Volume 1 (4th Edition)

Published by Pearson
ISBN 10: 0-134-98855-8
ISBN 13: 978-0-13498-855-9

Chapter 14 - Exercises and Problems - Page 273: 79


The radar will not work.

Work Step by Step

Using known equations in the chapter, we can find the equation for the velocity that the radar can detect is: $v = \frac{c\Delta f}{2f} = \frac{(10.8\times10^8 \ km/h)(50\ Hz)}{2\times 5\times10^9 \ Hz}= 5.4 \ km/h$ This is greater than the minimum speed allowed, so the radar will not work.
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