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Homework Help: Simple Harmonic motion of buoyant force

  1. Oct 19, 2011 #1
    1. The problem statement, all variables and given/known data
    a cylinder is in a deep pool of liquid. it has mass 2kg, diameter 10cm, height 15cm. the density of the liquid is 1.5g/cm^3. The cylinder is submerged up to 12cm, and let go. Show that the resulting motion is simple harmonic.

    2. Relevant equations


    buoyant force = M(of displaced water) * g
  2. jcsd
  3. Oct 19, 2011 #2
    Draw a FBD with all forces acting on system.
  4. Oct 19, 2011 #3
    i drew a fbd, and that got me F= F(buoyant)-mg

    thats as far as I can get... I've never felt so lost in a physics problem, i dont even know where to start...
  5. Oct 19, 2011 #4
    Try to find the position of equilibrium first.
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