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Homework Help: Question On fluid mechanics

  1. Jan 18, 2006 #1
    A cylindrical tank of diameter 90 cm rests on top of a platform 6m
    high. Initially the tank is filled with water to a depth of 3m. A plug
    whose are is 3 cm^2 is removed from the orifice on the side of the
    tank at the bottom.

    1) at what speed will water strike the ground?
    11) how long will it take for the tank to be empty?
  2. jcsd
  3. Jan 18, 2006 #2


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    What are your thoughts on this? Anything you got so far?
  4. Jan 18, 2006 #3
    Yeah, for part one:
    t^2 = 12/9.8
    t= (12/9.8)^.5

    v=u +at
    v= 0 + (12*9.8)^0.5
    this we could acheive

    But for part 2:
    Velocity of eflux changes with time. thus
    D(vol)/Dt = A*(2gh)^.5 = ((Pi*d^2)/4)*dh/dt
    Is this correct?
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