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Homework Help: Circular motion question

  1. Sep 14, 2007 #1
    Hi. I would like to know if someone could help me out in this pre-lab homework.

    Is only about theoretical x vs y graphics corelating frequency with radius, mass and centripetal force.

    I have thhis equation, Im not sure if there are others that should be used, tough.


    For the graphic f vs Cf Do I take in count radius and mass constant? Or do I just need antoher equation? Could you give it please?

    For the graphic f vs r Do I take in count centripetal force and mass constant? Or is it with other equation?

    For the f vs m graphic. Do I take in count radius and centripetal constant?

    Thank you a lot.
  2. jcsd
  3. Sep 14, 2007 #2


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    Gold Member

    Welcome to the forum. A useful technique is to replace the variable in the equation by x and y. So the Cf vs f graph is x=A.m.r.y^2 ( A=4.pi^2) and the f vs Cf is y=A.m.r.x^2,
    and so on. For anything that is not x or y, select a value that suits you.

    The shape of the graph will not be affected by your choice, only the lengths of the axes.
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