Question
When a constant force is applied to a body, is power of force constant? If not, how the force should be varied to keep the power of force constant?
Solution
We know, Power = Force X velocity.
When a constant force is applied on a body, it accelerates the body and hence speed of the body will change.
Therefore, the power of force will also change.
To keep the power of force constant, F v should be constant.
i.e., force should be inversely proportional to the speed of the body.
