Question

a car produces propulsion force 12 kilo N. when it is starling at 25m per second, what is the power developed by the car's engine?

Answer 1

the requested power P, is given by the subsequent formula:
\[\Large P = {\mathbf{F}} \cdot {\mathbf{v}} = Fv = 12 \times {10^3} \times 25 = ...watt\]

Answer 2

We know
Power p=w/t

Answer 3

w=Fs

Answer 4

p=Fs/t=F*s/t=Fv