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The engine of a car delivers a constant ...

The engine of a car delivers a constant power of "P" to the wheels. The resistive forces are constant at all speeds. The maximum speed that the car can achieve on a level road is v .If the car is going at v/3 ,the net force acting on the car is
(A) P/v
(B) 2P/v
(C) 3P/v
(D) zero

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