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Homework Help: Homework Task: Find the power of water

  1. May 2, 2013 #1
    1. The problem statement, all variables and given/known data
    Find the power of the water if it falls from the height (h= 20m), for every minute falls 80m^3 (Volume=80m3).

    2. Relevant equations
    W = mg
    A = Fh
    P= Fv

    3. The attempt at a solution
    I attempted to find the mass first, but I couldn't find any formula to do so.
  2. jcsd
  3. May 2, 2013 #2


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    Staff: Mentor

    1cc of water weighs 1 gram. So a liter of water weighs a kilogram. That should get you to the answer.
  4. May 2, 2013 #3
    If 80m^3 = 80000l, then that means the mass is 80000kg, aye?
  5. May 2, 2013 #4


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    Homework Helper

    Right so you have 80,000 kg falling per minute. How much kg per second is that? Hence how much Newtons per second is that?

    Remember that Power = Rate at which work is done = Force*distance/Time
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