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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

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