Pendulum investigation with a stop

1. Dec 6, 2003

exequor

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

$$T = \frac{-\pi^2}{g} (\frac{d}{T}) + 2\Pi \sqrt{\frac {l}{g}}$$

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. Dec 6, 2003

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.