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Uncertainty in physics

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  1. Sep 15, 2015 #1

    MBBphys

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    Gold Member

    1. The problem statement, all variables and given/known data
    How is uncertainty presented in physics?
    If we have:
    5.76 m rounded-->wouldn't the range of uncertainty be between the lower and upper bound:
    5.755m - 5.765 m
    However, my physics teacher said that, as the ruler you are measuring with in this scenario goes down to 0.01 m, you cannot go below that, so the range of uncertainty:
    5.75m - 5.77m
    Am I confusing lower/upper bound and range of uncertainty here?

    2. Relevant equations
    N/A

    3. The attempt at a solution
    N/A
     
  2. jcsd
  3. Sep 15, 2015 #2

    CWatters

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    Homework Helper

    I agree with your interpretation.

    At university one of our lecturers told us that humans were actually quite good at estimating to within 1/10th of the smallest scale. In other words if your smallest scale is centimetres then humans are quite good at estimating to within +/- 1mm.
     
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