A train of mass $3.3 \times {10^6}kg$ is moving at a constant speed up a slope inclined at an angle of 0.64° to the horizontal. The engine of the train is producing a useful output power of 14 MW.
Assume that there are no frictional forces opposing the motion of the train.
What is the speed of the train?
1 )
$0.43m{s^{ - 1}}$
2 )
$4.2m{s^{ - 1}}$
$39m{s^{ - 1}}$
4 )
$380m{s^{ - 1}}$
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