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Virtual Work - Determining Relations

  1. Oct 13, 2015 #1
    1. The problem statement, all variables and given/known data

    Hello, I'm having problems determining the relationships between delta a and delta c . I don't see how how delta C = 4/9 delta A

    http://imgur.com/a/B6eTx

    Thank you.
     
  2. jcsd
  3. Oct 13, 2015 #2

    SteamKing

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    What change in position do you get at points A and C when linkage ABC rotates by a small angle δθ? Remember, point B is fixed.
     
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