Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 5 - Force and Motion-I - Problems: 22b

Answer

2.4 $m/s^2$ upwards

Work Step by Step

The customer is moving downwards at 1.24g = 1.24*9.8 = 12.2 $m/s^2$ and the coin is moving downwards at 9.8 $m/s^2$. Setting the man as our reference point, he sees the coin as moving at -9.8 - - 12.2 = 2.4 $m/s^2$ upwards because he is falling down faster than the coin is and so the coin appears to be moving upwards to him.
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