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A running man has the same kinetic energ...

A running man has the same kinetic energy as that of a boy of half his mass. The man speed up by `2 ms^(-1)` and the boy changes his speed by `x ms^(-1)` so that the kinetic energies of the boy and the man are again equal. Then `x` in `ms^(-1)` is

A

`4sqrt(2)`

B

`2sqrt(2)`

C

`sqrt(2)`

D

`2`

Text Solution

Verified by Experts

The correct Answer is:
B
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