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A car-engine of mass 150 kg spends 500 W...

A car-engine of mass 150 kg spends 500 W power for 1 kg mass. How much force should be applied by the engine to run the car at uniform speed `20ms^(-1)`?

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The correct Answer is:
3750 N
Total power =`150xx500`
`=7.5xx10^(4)W`
Force = `("Power")/("Speed")`
`=(7.5xx10^(4))/(20)=3.75xx10^(3)N`
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