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A car is moving with a uniform velocity ...

A car is moving with a uniform velocity along a horizontal road. Does the engne of car do any work in this instance ?

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Force of friction acts opposite to the direction of motion of the car. Force applied by the engine of the car against friction maintains its uniform velocity . This force is doing work as displacement occurs against frication. If f= force of friction and v=velocity of the car, work done in 1s by the engine = force of friction `xx` constant velocity =fv.
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