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Cavendish experiment

  1. Sep 19, 2007 #1
    I read an article about the Cavendish experiment in Wikipedia: http://en.wikipedia.org/wiki/Cavendish_experiment

    and I feel I understood all relevant aspects.

    However, what is the significance of having a pair of big and small balls?

    Having 4 big balls would create more force (F) thus creating more deflection in the wire and making the experiment more precise by having a bigger angle to measure.

    Am I mistaken?

    Is one pair of balls small because they have less inertia to start moving?
  2. jcsd
  3. Sep 19, 2007 #2


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    I believe the reason the small balls are small is because they are connected to a precision torsion balance and it's tough to make such a thing that will support support a few hundred pounds of lead. Simple as that.
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