Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Force members

Tags:
  1. Nov 2, 2017 #1
    1. The problem statement, all variables and given/known data
    Pin A and C are the same, however in the solution manual it shows that C does not have a y component. Why is that?

    2. Relevant equations


    3. The attempt at a solution
     

    Attached Files:

    • 6.8.png
      6.8.png
      File size:
      4.7 KB
      Views:
      138
  2. jcsd
  3. Nov 3, 2017 #2

    mfb

    User Avatar
    2017 Award

    Staff: Mentor

    They are not.

    How would the beam at C transfer a vertical component?
     
  4. Nov 3, 2017 #3
    they are tho, they look exactly the same. why is it that c does not provide a vertical force?
     
  5. Nov 3, 2017 #4

    PhanthomJay

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    They are both pinned joints capable of taking forces in both the vertical and horizontal direction, but in this problem, no vertical force exists at C. You should attempt to answer the question asked by @mfb. What do you know about truss members with forces applied at joints?
     
  6. Nov 5, 2017 #5
    In order for there to be a vertical component of reaction at C, member CD would have to be inclined rather than horizontal..
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted