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Hydrostatic Force and Pressure

  1. Mar 24, 2009 #1
    1. The problem statement, all variables and given/known data

    A semicircle with radius 3 m is submerged vertically in water so that the top is 1 m above the surface. Express the hydrostatic force against one side of the plate as an integral and evaluate it

    8-3-5.gif

    I'm not getting the correct answer, so can someone help me to understand my mistake in setting up this problem?

    2. Relevant equations

    F = Pressure * Area
    Pressure = [tex]\rho[/tex]*g*d


    3. The attempt at a solution

    Pressure = [tex]\rho[/tex]*g*y = 9800*y
    Area = 2sqrt(9-y^2)dy

    And then I integreated pressure * area from 0 to 2.

    This seemed correct to me, but I got the wrong answer. Any hints?
     
  2. jcsd
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