Physics

Problem

A car travels at constant speed along a level road. Its engine delivers

12\,\text{kW}

of power to overcome a total resistive force of

300\,\text{N}

due to air resistance and friction. Determine the speed of the car in

\text{km\,h}^{-1}

. a)

72\,\text{km\,h}^{-1}

40\,\text{km\,h}^{-1}

144\,\text{km\,h}^{-1}

108\,\text{km\,h}^{-1}