Posts Tagged ‘kilowatthours’

How much energy (in kilowatt-hours) is required to transport a 170 pound person 16 miles on an electric train?

Wednesday, August 15th, 2012

Question by kewldude471: How much energy (in kilowatt-hours) is required to transport a 170 pound person 16 miles on an electric train?

Best answer:

Answer by someguy
ok well work is force x distance. and work is just difference in energy so if you take initial energy to be 0, energy is equal to force x distance.
now 170 pounds is about 77.27kg and the force is 757.27N. the distance is 16 miles = 25.75km so the energy is 19499.397 J. now a Watt is 1J/s. so 1W * 1s = 1J. so 19499.397J = 19499.397W-s. = ~19.5kW-s. multiply this by 1h/3600s (which is 1 cuz theyre equivalent) and you get 0.005416666 kw-h.

hope you understand that. let me know if you need more help

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