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Degrees Of Freedom

  1. Feb 16, 2014 #1
    What will be the degrees of freedom of a ''Connected pair of compasses''?
  2. jcsd
  3. Feb 16, 2014 #2


    Staff: Mentor

    Assuming they are rigidly connected then three degrees of translation, three degrees of rotation, and two compass needle positions.
  4. Feb 16, 2014 #3
    Have you thought about this?
    The needles will always be parallel.
    This is not a simple concept. There will be N-N repulsion and N-S attraction.
  5. Feb 16, 2014 #4

    Vanadium 50

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    Don't be rude.

    Just because their equilibrium positions are parallel does not mean they will always be parallel.
  6. Feb 16, 2014 #5


    Staff: Mentor

    The needles will not always be parallel. I can easily think of scenarios where they are not parallel.

    Yes, but that is irrelevant to the question of the number of degrees of freedom.
  7. Feb 16, 2014 #6
    I found that a "pair of compasses" refers to the tool for drawing arcs/circles. This question is so vague it's hard to begin to answer it in a coherent manner.
  8. Feb 17, 2014 #7
    Really the question is so vague.....I'm getting different results every time....
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