Thanks all. I'll set up a very tall, heavy pendulum and see what I get. I might also do the experiment a few times at different angles to see how much effect the angle has on the measurement of g.
In the interest of theoretical knowledge, is there a way to deal with the lessening swings? For...
I'd forgotten about pendulums! Do you think 4π2L / T2 will be accurate enough for my purposes, or do I need to work harder? If the latter, how can I deal with lessening swings?
Though standard gravity is 9.80665 m/s2, it must vary from city to city, since the Earth is neither a perfect sphere nor of uniform composition.
I'm looking for an experiment to accurately determine the value of g at my current location. The method needs to be precise enough to yield different...