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Homework Help: Archimedes Principle

  1. Jun 6, 2010 #1
    1. The problem statement, all variables and given/known data
    a 6500kg iceberg is afloat in the sea. the icebergs density is 930kg/m^3 and the sea water has density of 1030kg/m^3
    a) find the buoyant force on the iceberg
    the volume of water displaced and the fraction of the icebergs volume that is below the waterline.

    2. Relevant equations

    F_B=x_displaced=rho g V

    3. The attempt at a solution
    i have no idea how to do this i thought that maybe since its not sinking its in equilibrium relative to something but i have no idea if thats even right or not.. thanks for any help in advance.
  2. jcsd
  3. Jun 6, 2010 #2


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    Staff: Mentor

    You are on the right track. It is pulled down by gravity, and pushed up by buoyancy - these are two forces in equilibrium. One of these is very easy to calculate from the data given - that gives you the other one (they are in equilibrium, which means they are identical).
  4. Jun 6, 2010 #3
    ok thank you i cant believe i missed that - problem solved thanks to you and PF!!
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