A body of mass m=10^(2) kg is moving in...

A body of mass `m=10^(2) kg` is moving in a medium and experiences a frictional force `F=-Kupsilon^(2).` Its initial speed is `upsilon_(0)=10ms^(-2)`. If , after `10s`, its energy is `(1)/(8)m upsilon_(0)^(2)`, the value of `k` will be

A

`10^(-4)" kg m"^(-1)`

B

`10^(-1)" kg m"^(-1)s^(-1)`

C

`10^(-3)" kg m"^(-1)`

D

`10^(-3)" kg s"^(-1)`

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The correct Answer is:

A

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