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[" 0.A rubber ball is dropped from a hei...

[" 0.A rubber ball is dropped from a height of "10m" on "],[" a plane,where the acceleration due to gravity is "],[" not known.On bouncing it rises to "6.4m" .The ball "],[" loses its velocity on bouncing by a factor of :- "],[[" (1) "(1)/(5)," (2) "(2)/(5)," (3) "(3)/(5)," (4) "(4)/(5)]]

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