physics

Suppose the smallest division on the scale of the timing device is t, the reaction time of a normal person os t', which one should be used for estimating the incertainty on the measurement of period T after a single timing activity? Explain briefly.

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asked by gay
  1. The reaction time delay, if always the same, will not affect the measurement of an intervsal of time, since it affects both the beginning and the end of the interval T in the same way. However, reaction time can vary from one measurement to another. I would estimate the rms variation in reaction time to be about t'/3, resulting in an interval measurement error of 0.47 t' and a total measurement error (standard deviation) of about sqrt(t^2 + 0.2 t'^2)

    This is probably not the answer they are expecting. They probably want you to say t.

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    posted by drwls

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