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Shifting of Centre of Gravity

  1. Jul 11, 2015 #1
    In the first attachment, the normal reactions are equal. But when the rod is displaced a slight distance x towards the right (second attachment), the normal reactions change to R1 and R2 with R2 being greater than R1. Why is that?

    Attached Files:

    • 1.png
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    • 2.png
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      51.3 KB
  2. jcsd
  3. Jul 11, 2015 #2
    Hi andy

    The plank and the cylinders are in rotational equilibrium . Can you write down the torque equation for the plank about G ? This should give you the answer you are looking for :smile: .
  4. Jul 11, 2015 #3
    Yes it worked. Thanks for that. But is there a qualitative explanation to it too? Something like: The CG shifted which made more mass come on top of one cylinder than the other...? Similarly, is there some qualitative explanation to why the normal reactions are equal when the plank is not displaced?
  5. Jul 11, 2015 #4
    I don't know :oldsmile:
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