University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 2 - Motion Along a Straight Line - Problems - Discussion Questions - Page 57: Q2.5

Answer

a. Yes. b. Yes.

Work Step by Step

a. Imagine a car moving toward the right with positive velocity. The driver steps on the brake (applying a negative acceleration) and then steps harder (the negative acceleration increases in magnitude). Meanwhile, the car is slowing down the entire time. b. Imagine a car moving toward the right with positive velocity. The driver steps hard on the gas/throttle (applying a high positive acceleration) and then lets off just a little (the positive acceleration decreases). Meanwhile, the car is speeding up the entire time.
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