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A simple question

  1. May 11, 2009 #1
    1. The problem statement, all variables and given/known data



    The attached question(question 1) is in finnish, but you'll understand it no problem!;) The answers are given at the end of the text part of the question.

    2. Relevant equations



    3. The attempt at a solution
    Firstly, I'm wondering how can Ay be bigger than Ax even though the X side of the little triangle at the left end of the boom is 4 and Y is 3?

    Secondly, why can't I write the equation for the x dimension as follows: [tex]\sum[/tex]F= -400sin15+0,8A=0
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. May 12, 2009 #2

    Redbelly98

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    Staff Emeritus
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    Homework Helper

    A is not a normal*** force. If it were, we'd have

    Ax = 3/5 A

    A must act to balance the other forces that are present. Since the other forces are close to being vertical, A is closer to vertical than to horizontal.


    *** "normal" means the force is perpendicular to the surface
     
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