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Am I using the Right Formula?

  1. May 7, 2016 #1
    1. The problem statement, all variables and given/known data
    Capture.JPG

    2. Relevant equations
    I want to say I should be using this one:
    aA = aB + α x rA/B + ω x (ω x rA/B)

    3. The attempt at a solution
    The only problem is that if I'm supposed to find the angular acceleration then i'd have to take the... inverse of the cross product? To get it back and I don't think that that's possible. I also want to say that it's zero because OQ moves with constant angular velocity, but I believe that that would result in PQ moving with acceleration because theta would be changing?
     
  2. jcsd
  3. May 7, 2016 #2

    haruspex

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    I don't think that equation will help.
    Just use a bit of geometry to find the angle of the bar PQ as a function of theta.
     
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