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An engine is pulling a train of mass m o...

An engine is pulling a train of mass `m` on a level track at a uniform speed `u`. The resistive froce offered per unit mass is `f`.

A

Power produced by the engine is `mfu`

B

The extra power developed by the engine to maintain a speed `u` up a gradient on of `h` in `s` is `(mghu)/(s)`.

C

The frictional force exerting on the train is `mf` on the level track

D

None of above is correct

Text Solution

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The correct Answer is:
A, B, C
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