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Internal forces in truss

  1. Jan 10, 2017 #1
    1. The problem statement, all variables and given/known data
    For this problem , i found that the internal force AB at point A and point B pointed in the same direction ( as shown) in my working , so , how they cancel off each other ???Since they cant cancel off each other , so they are not stable , right ? The structure is statically indeterminate ?

    2. Relevant equations


    3. The attempt at a solution
    It's in the 3rd photo
     

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  2. jcsd
  3. Jan 10, 2017 #2

    PhanthomJay

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    you forgot to consider the horizontal force reaction.
     
  4. Jan 11, 2017 #3
    which
    one ? which part ? Can you point out ?
     
  5. Jan 11, 2017 #4

    PhanthomJay

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    see your first attachment , bottom of page, sum of forces in x direction = 0.
     
  6. Jan 11, 2017 #5
    One more question here , how to get the value of µ ? It's not stated in my textbook what is it ... And what is the usage of µ ?
     
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