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A train has a constant speed of 40 ms^(-...

A train has a constant speed of 40 `ms^(-1)` on a level road against resistive force of magnitude `3xx10^(4) N`. Find the power of the engine.

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Verified by Experts

At constant speed, there is no acceleration, so the forces acting on the train are in equilibrium.
Therefore, `" " F=R`
`:. F=3xx10^(4) N " or " P=Fv`
We have , power `=3xx10^(4)xx40=1.2xx10^(6) W`
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