I have a 300 kg piano being lifted at a steady speed from the ground to a hieght of 10 meters and the crane that is doing the lifting is providing 400 watts of power. How much time does it take to get the piano to the top.(adsbygoogle = window.adsbygoogle || []).push({});

So far I have Power = work/Time

so time is Work/ power , so, work is equal to mass X gravity X hieght

so I have (300)(9.8)(10)/(400) = 73.5 sec....is this correct....any help would be nice. Thanks

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# Homework Help: Power question

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