SOLUTION: A crane lifts a 4000 N piano moving it 50 m in 5 seconds, how much power does the crane use?

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Question 1198635: A crane lifts a 4000 N piano moving it 50 m in 5 seconds, how much power does the crane use?
Answer by ikleyn(52879) About Me  (Show Source):
You can put this solution on YOUR website!
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In this problem, the power is the product of the constant force (4000 N) by the constant average speed  50%2F5 = 10 m/s

    power = 4000 N * 10 m/s = 40000 %28N%2Am%29%2Fs = 40000 W  (watts).    ANSWER

Solved.