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A boy of mass 25 kg stands on a board of...

A boy of mass 25 kg stands on a board of mass 10 kg which in turn is kept on a frictionless horizontal ice surface. The boy makes a jump with a velocity component 5m/s in a horizontal direction with respect to the ice. With what velocity does the board recoil? With what rate are the boy and the board seperate from each other?

A

`2m//s`

B

`sqrt5m//s`

C

`0.5sqrt2m//s`

D

`10sqrt2m//s`

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