Physics

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If a man has an average useful power output of 31 W, what is the minimum time, in s, it would take him to lift fifty 12.3 kg boxes a height of 2.3 m.


i'm thinking i should find the work done then find power with p = work/time

  • Physics -

    Yes, that is how to do it. You will rearrange the last formula to give

    time = work/power

    The work is 50*12.3*g*2.3
    = 1.386*10^4 J

    It will take about 1 1/4 hours.

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