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Energy Systems-Power

  1. Sep 30, 2008 #1
    1. The problem statement, all variables and given/known data

    A sump pump moves 20 gal/min of water from a basement of a building to storm drain 6ft above. Determine the power required for the pump. (Assume the pump is 100% efficient and that changes in kinetic energy are negligible.)

    2. Relevant equations
    Power= Work x Time
    Kinetic Energy=1/2mV^2

    3. The attempt at a solution
    The equation can be re-written as Power= Force x Velocity but I am unsure of how to continue with this problem. Any help getting me on the right track would be very appreciated.
  2. jcsd
  3. Oct 1, 2008 #2


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    Science Advisor
    Gold Member

    This is clearly homework, so shouldn't be posted here.

    Anyway, I'm not sure where you got Power = work x time from; that is incorrect so that won't help your working. Also, the question says that changes in kinetic energy can be assumed to be negligible, so do you know any other formulae for energy which may be relevant here?
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