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Homework Help: Resultant force on pipe (Fluid Mechanics)

  1. Sep 24, 2015 #1
    1. The problem statement, all variables and given/known data
    Posted in picture below

    2. Relevant equations
    Bernoulli's Equation
    P/pg + v1^2/2g + z1 = P/pg + v2^2/pg + z2

    3. The attempt at a solution
    Posted in picture below

    Wasn't sure if what I did was correct...still practising the topic itself

    Attached Files:

  2. jcsd
  3. Sep 24, 2015 #2
    The quality of your exhibits is very poor, but, as best I could tell, your approach is on target. But I wish I could see a cleaner rendition of your momentum balance.

  4. Sep 24, 2015 #3

    Sorry about that
    I think it got messed up when it was uploading.

    These are my cacluations for momentum

    Im thinking that I was supposed to make the momentum in the y direction negative?

    Attached Files:

  5. Sep 25, 2015 #4
    I still can't read it. Did you remember to include the pressure forces on the fluid entering and leaving?
    What you're trying to do is a momentum balance on the fluid passing through the y. The force of the fluid on the y is then minus the force of the y on the fluid.

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