physics help for a class?

  • Thread starter Thread starter godchild1725
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godchild1725

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1. A 0.32 kg ball is moving horizontally 30. m/s just before bouncing off a wall, thereafter moving 25. m/s in the opposite direction.
(a)What is the magnitude of its change in momentum?
(b)What percentage of the kinetic energy was lost in the collision?
 
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