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  4. A car of mass 500 kg is driven with acceleration 1 m / s 2 along straight level road against constant external resistance of 1000 N. When the velocity is 5 m / s the rate at which the engine is working is :

Q. A car of mass is driven with acceleration along straight level road against constant external resistance of . When the velocity is the rate at which the engine is working is :

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Solution:

For motion of car we use


Power


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