Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 5 - Think and Explain: 71

Answer

In the absence of air resistance, no horizontal force acts on the ball. We use Newton's first law to conclude that the horizontal velocity of the ball remains constant. This is discussed on page 84.
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