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Hibbeler dynamics help

  1. Aug 2, 2010 #1
    1. The problem statement, all variables and given/known data

    20-7
    If the top gear B rotates at a constant rate of [tex]\omega[/tex], determine the angular velocity of gear A, which is free to rotate about the shaft and rolls on the bottom fixed gear C.

    2. Relevant equations
    V=[tex]\omega[/tex] x r
    Va=Vb + [tex]\omega[/tex] x r


    3. The attempt at a solution
    I'm really having trouble figuring out how to start...I keep getting answers with i (and I know I am doing my cross products right, and I should be getting answers with j and k.
     
  2. jcsd
  3. Aug 2, 2010 #2

    berkeman

    User Avatar

    Staff: Mentor

    I think we need a drawing or sketch, before we'll be of much help on this one.

    Welcome to the PF, BTW.
     
  4. Aug 2, 2010 #3
    Last edited by a moderator: May 4, 2017
  5. Aug 2, 2010 #4
    I got the answer in the back of the book, but I am not confident on the methods by which I got it. So if anyone needs help on this question, I will be able to give concrete reasoning after tomorrow.
     
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