Answer
Black Line represents the velocity of the train
Red Line represents the distance traveled
Work Step by Step
Accelerations are constant so the horizontal lines represent the accelerations of the train throughout the trip.
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 2 - Motion Along a Straight Line - Problems - Page 34: 38d
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