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Simple Density Problem

  1. Nov 16, 2007 #1
    1. The problem statement, all variables and given/known data
    A solid object has a weight of 17.22 N. When it is suspended from a scale and submerged in water, the scale reads 5.18 N. Find the density of the object (use ρwater = 1000 kg/m3).


    2. Relevant equations
    p = m/v


    3. The attempt at a solution
    I don't know how to figure this out without having the volume? Or does it have something to do with buoyant forces??
     
  2. jcsd
  3. Nov 17, 2007 #2
    If I use the buoyant force equation...
    Fb = Po * Vo * g
    then solve for V?
     
  4. Nov 17, 2007 #3

    Shooting Star

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    What is Po? If you use Archimedes' Principle, you'll get it immdtly. Refer to your other post. That's why I asked you to state it, at least.
     
  5. Nov 17, 2007 #4
    Po is density of the object.
     
  6. Nov 17, 2007 #5

    Shooting Star

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    The reduction in force is equal to the upward buoyant force, which I have shown how to find in your other post.
     
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