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Q.

Find the power of an engine which can draw a train of 400 metric ton up the inclined plane of 1 in 98 at the rate of 10ms–1. The resistance due to friction acting on the train is 10N per ton.

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a

350kW

b

400kW

c

440 kW

d

500kW

answer is C.

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Detailed Solution

P=FRv+mg sinθv
P=40000+400×103×9.8×198×10=440 kW

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