Answer
(a) The same.
(b) II.
Work Step by Step
The elevator is moving with constant speed. Thus it is an inertial reference frame and the same laws of physics apply inside the elevator.
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 5 - Newton's Laws of Motion - Problems and Conceptual Exercises - Page 144: 52
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