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Hydrostatic Pressure HELP!

  1. Oct 19, 2013 #1
    For the hydrostatic pressure, when do we use [ p = ρ.g.h ] and [ p = ρ.g.hcg ]

    where:
    ρ = density
    g = acc of gravity
    h = height of water column
    hcg = the distance to the center of gravity from the surface of water downward
     
    Last edited: Oct 19, 2013
  2. jcsd
  3. Oct 20, 2013 #2

    SteamKing

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    It depends. h should actually be measured from the surface to the 'center of pressure', which is not always located at the c.g. of a submerged body.

    http://www.nptel.iitm.ac.in/courses/Webcourse-contents/IIT-KANPUR/FLUID-MECHANICS/lecture-5/5-2_hydro_thrust_plane_surf.htm [Broken]
     
    Last edited by a moderator: May 6, 2017
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