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Homework Help: Buoyant forces with 2 liquids question

  1. Nov 22, 2007 #1
    Hi, I have a tricky question, and was hoping somebody could explain to me how I would go about solving it. Here it is:
    Oil having a density of 930 kg/m3
    floats on water. A rectangular block
    of wood 4.00 cm high and with a
    density of 960 kg/m3 floats partly in
    the oil and partly in the water. The
    oil completely covers the block. How
    far below the interface between the
    two liquids is the bottom of the
    the answer is x = 1.71 cm
    Any help is much appreciated.
  2. jcsd
  3. Nov 22, 2007 #2

    Doc Al

    User Avatar

    Staff: Mentor

    What have you done so far? Start by finding the forces acting on the top and bottom of the floating block.
  4. Nov 22, 2007 #3


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    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    It can also be advantegous to determine the weight of the block. :smile:
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