An automobile cruises along a level road at a steady speed of

PHYSICS · Subjective · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

72\,\text{km/h}

. Its engine develops a constant power output of

18\,\text{kW}

. Assuming all this power is used to overcome the resistive forces of the road and air, calculate the total retarding force acting on the car.