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    Ldobry7554's Avatar
    Ldobry7554 Posts: 13, Reputation: 1
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    #1

    May 25, 2010, 09:58 AM
    What power is required?
    What power is required to push a train weighing 110,000 kilograms up an incline of 1 in 100 at 20 kilometers per hour, all frictional resistances being neglected?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    May 25, 2010, 11:00 AM

    Power = force times velocity. The velocity you know - it's 20 KPH, but you need to convert this to meters per second. The force is the component of the train's weight that is acting to oppose the movement - so that's 110,000 Kg times g times sin(1/100). Multiply this opposing force (in newtons) by the velocity (n m/s) to get power (in watts).
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