Question

If a force f is applied on a body and that moves with velocity v the power will be

Answer 1

Power = Work/ Time.
Work = Force x displacement
So, now Power = Force x displacement / Time.
But displacement / Time = velocity
According to the question, Force is F and V is velocity so,
Power = F x v

But power is a scalar quantity so, we have dot product for power so......
Power = Fv or F.v

Thanks.

Answer 2

Here is your answer

Hope it will help you