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Homework Help: Normal stress

  1. May 4, 2012 #1
    The problem

    Why is the normal stress 75/Area and not 125/Area. They are both acting on the same axis so how do I know which one to choose?

    And what does (QA) mean?
    Last edited: May 4, 2012
  2. jcsd
  3. May 4, 2012 #2
    hard to say without more context.
  4. May 4, 2012 #3
    I linked the problem and how it's solved, you must have missed it so here it is again BNJJF.png
  5. May 4, 2012 #4


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    The 75 and 125 lb loads are not acting along the same axis. The 75 lb load is in the direction of the y axis, and the 125 pound load is along the x axis. Only the 75 pound load contributes to the axial stress along the shaft. The 125 pound load produces bending and shear stresses, but not axial stresses.
  6. May 5, 2012 #5
    They're not acting along the same axis.
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