Essential University Physics: Volume 1 (3rd Edition)

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

Chapter 8 - Exercises and Problems - Page 142: 42


The ball went less than a mile.

Work Step by Step

We know that a mile is 1.6 kilometers. Thus, we compare the ratio of gravity on earth to that on the moon: $ = 257 \times\frac{9.81}{1.625}=1.55\ km$ This is less than 1.62 km, so the astronaut is wrong: the ball went less than a mile.
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