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Velocity of a body of mass 2kg moving in...

Velocity of a body of mass `2kg` moving in `x-y` plane is given by `vecv=(2hati+4thatj)m//s`, where `t` is the time in second. The power delivered to the body by the resultant force acting on it at `t=5sec` is.

A

`80 m//s^(2)`

B

`160 m//s^(2)`

C

`40 m//s^(2)`

D

`100 m//s^(2)`

Text Solution

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`"Power"=(d(K.E.))/(dt)`
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