Conceptual Physics (12th Edition)

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

Chapter 3 - Think and Discuss: 96

Answer

a. Average speed is distance divided by time, and the distances are equal. The ball on track B finishes first, so it has the higher average speed. b. The ball is moving equally fast at the ends of tracks A and B because the ball has dropped an equal distance from the starting point. In other words, the speed gained on the additional downramp for B is lost when it climbs the final upramp.
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