University Physics with Modern Physics (14th Edition)

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

Chapter 3 - Motion in Two or Three Dimensions - Problems - Discussion Questions - Page 92: Q3.3


No. Yes.

Work Step by Step

The acceleration points downward at all times, and the particle is never moving straight downward, so the acceleration and velocity vectors are never parallel. At the top of the parabolic path, the particle’s velocity has no vertical component, and it is moving strictly horizontally. At that moment, the acceleration and velocity vectors are perpendicular. See Figure 3.23, at time t1.
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