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March 27, 2017

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A piano whose mass is 106 kg is being lifted at a steady speed from ground level straight up to an apartment 12.4m above the ground. The crane that is doing the lifting produces a steady power of 565W. How much time does it take to lift the piano?

  • math/not art - ,

    Although a piano requires considerable art to play it well; its weight is really not 'artistic'.

  • art - ,

    Power=weight*height/time

    time=weight*height/power.

    time will be in seconds.

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