The power required by the engine to resist the wind drag is

Question

A car of mass 2000kg is travelling at a constant speed of 50 m/s. The car has to resist a wind

drag F_D = 10v (N) where v is the velocity of the car in m/s. The power required by the engine is

(a)  5 kW               (b) 10 kW

(c) 25 kW              (d)  50 kW