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Homework Help: Buoyancy

  1. May 10, 2005 #1
    Buoyancy ... HELP NEEDED

    A polar bear is partially in water and partially on a slab of ice. The ice sinks to some extent. Calculate the bear's mass.

    How can this be done?

    I know it comes down to forces but how . . .
    Last edited: May 10, 2005
  2. jcsd
  3. May 10, 2005 #2


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    Gold Member

    Not forces - it will come down to how much of the bear is in the water and how much is out of the water. However much is out of the water will directly add to the mass of the ice slab, causing it to sink lower, displacing that much more water.

    Of course, you can't answer this question without more information (unless you are merely providing an algebraic answer.)
  4. May 10, 2005 #3
    70% is out of the water
    voume of the ice is 10m^3
    bear's specific gravity is 1.0
  5. May 10, 2005 #4
    someone please help ... please
  6. May 10, 2005 #5
    help anyone :confused:
  7. May 11, 2005 #6


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    Science Advisor

    You still haven't given us enough information: the ice sinks "to some extent". How much?
    The bear's specific gravity is exactly the same as water? What is the specific gravity of the ice?
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