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A partical of mass m is driven by a mach...

A partical of mass `m` is driven by a machine that deleveres a constant power `k` watts. If the partical starts from rest the force on the partical at time `t` is

A

`sqrt((mk)/(2))t^(-(1)/(2))`

B

`sqrt(mk)t^((-1)/(2))`

C

`sqrt(2mk)t^((-1)/(2))`

D

`(1)/(2)sqrt(mk)t^((-1)/(2))`

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The correct Answer is:
A
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