Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 9 - Section 9.6 - Elastic Collisions - Example: 9.11

Answer

The angle is 60 degrees.

Work Step by Step

Whenever there is a 2-D elastic collision where there are two objects of equal mass and one is initially at rest, the objects will always go at a 90 degree angle to each other. Because the first object goes 30 degrees below the x-axis, this means that the other object must go 60 degrees above the x-axis.
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