Essential University Physics: Volume 1 (3rd Edition)

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

Chapter 9 - Exercises and Problems: 89

Answer

She makes it back in 3.33 minutes, which is enough time.

Work Step by Step

We know that momentum is conserved. Thus, we find: $v = \frac{10\times8}{80}=1\ m/s$ Thus, it will take her: $\frac{200}{1}=200 \ s = 3.33 \ min$
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