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Homework Help: Uncertainties of Dimensionless Units

  1. Mar 3, 2012 #1


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    I have a physics project, but how do I express the uncertainty of a dimensionless quantity?

    E.g. how do I express the uncertainty of the coefficient of friction?

    Do I just write 0.403 ±0.02?
  2. jcsd
  3. Mar 3, 2012 #2
    The way you write uncertainty is fine. But there's not much point in putting the "0.003" if it's ± 0.02... Might as well write: 0.40 ± 0.02
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