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A train weighing tO7 N is running on a level track with uniform speed of 36 km/h. The frictional force is 0 . 5 kg f per quintal. What is the power of the engine ? Take
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a
0.5kw
b
5 kw
c
50 kW
d
500 kW
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Correct option is D
Mass of the train=107/10kg=106kg=104 quintal Friction = 0.5 kg f per quintal =104×0.5kgf=104×0.5×10N =5×104N velocity =36km/h=10m/s ∴ Power =F×V =5×104×(10)W=500kWSimilar Questions
If force F is applied on a body and it moves with the velocity V, the power will be :
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