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Dynamics problem: Crankshaft angular speed?

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  1. Dec 4, 2016 #1
    1. The problem statement, all variables and given/known data
    iamgem.png

    2. Relevant equations
    Kinematic theorems:

    upload_2016-12-4_16-3-15.png
    upload_2016-12-4_16-3-57.png

    3. The attempt at a solution

    upload_2016-12-4_16-5-29.png
    Ok, I'm trying to use another angle, phi, and find some relation betwen phi and theta so I can derive the equation for the angular velocity of rod B with respect to S, but I'm stuck at that point. How should I proceed with this problem?
     

    Attached Files:

  2. jcsd
  3. Dec 5, 2016 #2

    Nidum

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    Science Advisor
    Gold Member

    Hint : Use the x y coordinates of the crank pin .
     
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