Use a pendulum experiment to find the acceleration due to gravity.

A pendulum is a cable of length L, attached to a fixed point p, and holding a bob of mass m. Under the action of several forces, including the length of the cable and the effect of gravity, the pendulum oscillates back and forth. You can use the formula below to determine gravity by swinging a pendulum and timing one period, as well as measuring the length of the string.

T is the period of the pendulum, in seconds

L is the length of the pendulum, measured from the top end of the string to the center of the bob, in meters

g is the acceleration due to gravity, in meters per second squared

Go to an on-line experiment and chose the option for those without equipment. Prepare the graph and answers and hand them in for extra credit.