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kabton14
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Homework Statement
A engine used to raise a lift is 60% efficient, and the lift's mass is 2000kg. How much energy would be needed to raise it to 10m?
Homework Equations
Efficiency = energy output/ energy input *100
The Attempt at a Solution
EP=mgh = 2000*9.8*10= 196000 J.
Therefore, eff. = energy output/energy input *100 = (0.6=EOUT/196000
EOUT= 0.6*196000=117600 J
Am I on the right track?