Conceptual Physics (12th Edition)

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

Chapter 7 - Think and Discuss: 120


If one ball popped out with twice the speed, momentum would be conserved. $$mv + mv = m(2v)$$ However, energy would not be conserved, so this can never happen. $$ \frac{1}{2}mv^{2} + \frac{1}{2}mv^{2}$$
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