Question

A force of 10 N moves a body with a constant speed of 2m/s. Calculate the power of the body.

Answer 1

power of body is given by product of force acting on body and velocity of body
power = 10×2=20Nm/s

Answer 2

One another formula of power is -

Force*velocity

So simply power is 10*2=20

The derivation of formula is in the pic