1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook