question_answer

If a force F is applied on a body and it moves with a velocity V, the power will be (a) \[F\times v\]                               (b) \[F/v\]  (c) \[F/{{v}^{2}}\]                             (d) \[F\times {{v}^{2}}\]

Answer:

We know \[P=\frac{W}{t}\]         But,\[W=F\times S\] \[\therefore \] \[P=\frac{F\times S}{t}\] \[\Rightarrow \] \[P=F\times v\]             \[\left[ \because V=\frac{S}{t} \right]\]