A 1.50 x 103 kilogram car starts from rest and accelerates uniformly to 16.0 m/s in 11.5 second. Suppose that air resistance remains constant at 400 N during this time.
(a) Compute the average power developed by the engine.
(b) Compute the instantaneous power output of the engine at t= 11.5 second, just before the car stops accelerating.