Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 3 - Kinematics in Two Dimensions; Vectors - Questions: 18

Answer

a. The ball lands right back in the person’s hand. b. the ball lands behind the person’s hand. c. The ball lands in front of the person’s hand. d. The ball lands to the right of the person’s hand. e. The ball lands behind the person’s hand.

Work Step by Step

a. See conceptual example 3-4. b. If the car accelerates forward, the ball continues moving forward at the same old horizontal velocity, and therefore lands behind the person’s hand. c. If the car slows down (“decelerates”), the ball continues moving forward at the same old horizontal velocity, and therefore lands in front of the person’s hand. d. If the car curves (assume it curves to the left), the ball continues moving forward at the same old horizontal velocity, and lands to the right of the person’s hand. e. The ball will be slowed down by air resistance, while the person’s hand moves at constant horizontal velocity. The ball lands behind the person’s hand.
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