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Instantanious center of rotation problems

  1. Sep 11, 2014 #1
    1. The problem statement, all variables and given/known data
    what is the instantaneous center of rotation for the rigid body.

    OA = 16
    AB = 25
    AD = 60
    BC = 35
    2. Relevant equations


    3. The attempt at a solution

    I am assuming the values angles and vectors from red because I think the problem is impossible to solve without assuming AB is the top side of a parallelogram. I determined the velocity of A by the same relevant equation. If my assumption is correct Vb and Vd move in the same velocity and direction. since they are parallel and in the same direction the center of rotation at this instant is infinite and therefore AD has translational motion. BC is not translational but piston C is translational. It seems the instantaneous center of rotation for member BC is at point C when i draw perpendicular lines to the vectors Vb and Vc. Any ideas
  2. jcsd
  3. Sep 15, 2014 #2
    I'm sorry you are not finding help at the moment. Is there any additional information you can share with us?
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