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Show the solution and illustration. A 1-kg rubber ball travelling east at 4.0 m/s hits a wall and bounces back toward the west at 2.0
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A 1-kg rubber ball travelling east at 4.0 m/s hits a wall and bounces back toward the west at 2.0 m/s. Compared to the kinetic energy of the ball before it hits the wall, the kinetic energy of the ball after it bounces off the wall is, Ans: 14 as great
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