A 1.50 ? 103-kg car starts from rest and accelerates uniformly to 16.5 m/s in 12.4 s. Assume that air resistance remains constant at 400 N during this time.
(a) Find the average power developed by the engine.
________W
(b) Find the instantaneous power output of the engine at t = 12.4 s, just before the car stops accelerating.
_________W