A ball falls from a height of 20m and loses three-forth of its total energy. With what velocity does the ball rebound?
a) 10/√2 m/s
b) 10 m/s
c) 10 √2 m/s
d) 10 √3 m/s
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The velocity does the ball rebound is 10 m/s
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20 3/4 = you have to write answer
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