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Pendulum investigation with a stop

  1. Dec 6, 2003 #1
    I did this experiment with various values for (d), which is the height from the top of the string to the stop. The length of the string was 0.7m. Since i used 6 differnt values for (d) i got 6 readings.

    why i stated all this is because i have to find g from the following expression

    [tex]T = \frac{-\pi^2}{g} (\frac{d}{T}) + 2\Pi \sqrt{\frac {l}{g}} [/tex]

    I have tried lots of variations but i just can't find anything close to 9.8m/s^2.

    what i did was i tried a single set of results like:
    d = 0.5m
    T = 1.31
    thus d/T = 0.38
    and l = 0.7m

    could someone use the same and tell me what their result for g was, please.
    Last edited: Dec 6, 2003
  2. jcsd
  3. Dec 6, 2003 #2
    I got g=9.48

    If you're having trouble solving that, try transforming it into a quadratic equation. You could also move T to the right side, plot it as a function of g, and find the roots.
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