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Is the curve a spiral? And what spiral?

  1. Mar 31, 2015 #1
    1. The problem statement, all variables and given/known data
    The problem: the distribution of pressure of the left side of the circular cylinder
    111.jpg

    2. Relevant equations
    ρ= the density of water
    γ=ρg
    P=ρgh
    circle O = a long wooden circular cylinder

    3. The attempt at a solution

    37367_8e6c1425435027db9c9c3404d2a64.jpg



    MY QUESTION:
    Please see the curve indicated by the green/purple circle in the above picture.
    Is the curve a spiral? And what spiral?
     
  2. jcsd
  3. Mar 31, 2015 #2
    222.jpg
    A sketch map
     
  4. Mar 31, 2015 #3
    I was ever sure the curve isn't an Archimedean spiral by calculation and verification.
    Please see the following 2 figures.
    (Of course, I may be wrong!)
    1.jpg
    2.JPG
     
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