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Homework Help: Find the mass

  1. Jan 31, 2008 #1
    1. The problem statement, all variables and given/known data
    A pump with a power output of 600W raises water from a lake through a height of 3.0m and delivers it with a velocity of 6.0 ms^-1. what mass of water is removed from the lake in one minute?

    2. Relevant equations
    Kinetic Energy = 1/2*m*v²

    3. The attempt at a solution
    600 = 1/2*M*6.0²
    M = 200kg
  2. jcsd
  3. Jan 31, 2008 #2
    You can't substitute 600W for the kinetic energy, because energy is measured in joules, not watts. Try and use [tex]P=F*V_{ave}[/tex].
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