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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 mfy

B

the extra power developed by the engine to maintain a speed v up a gradient of h in s is `(mghv)/(v)`

C

the frictional force exxerting on the train is mf on the level track

D

non of above

Text Solution

Verified by Experts

The correct Answer is:
D
Total resistive force=mf `rArr` power =fv=mfv
Extra power required= `(mg sin theta)v=(mghv)/(s)`
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