Physics (10th Edition)

Published by Wiley
ISBN 10: 1118486897
ISBN 13: 978-1-11848-689-4

Chapter 4 - Forces and Newton's Laws of Motion - Focus On Concepts - Page 112: 12


(d) is the correct answer.

Work Step by Step

The apparent weight of a passenger in an elevator is greater than his true weight. In other words, $F_N\gt mg$ and can be explained by the fact that the elevator is accelerating, which increases the normal force on the passenger: $$F_N=mg+ma$$ There are 2 situations which can lead to that: 1) $F_N-mg=ma$ or the elevator is accelerating upward 2) $mg-F_N=-ma$ or the elevator is moving downward but it is decelerating So (d) is the correct answer.
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