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Elementary,Middle School,High School,College,University,PHD
| Teaching Since: | May 2017 |
| Last Sign in: | 402 Weeks Ago, 4 Days Ago |
| Questions Answered: | 66690 |
| Tutorials Posted: | 66688 |
MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
15–78. Using a slingshot, the boy fires the 0.2-lb marble at the concrete wall, striking it at B. If the coefficient of restitution between the marble and the wall is e = 0.5, determine the speed of the marble after it rebounds from the  wall.
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15–81. The girl throws the 0.5-kg ball toward the wall with an initial velocity yA = 10 m>s. Determine (a) the  velocity at which it strikes the wall at B, (b) the velocity at which it rebounds from the wall if the coefficient of   restitution e = 0.5, and (c) the distance s from the wall to where it strikes the ground at  C.
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Prob. 15–7
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