Calculate the acceleration of gravity at CCVALG:

1 – Press the pedal with your foot.

2 – Record the initial count displayed on the counter.

3 – Use a stopwatch (for example, on your phone) and measure a time interval of your choice (no longer than 5 minutes).

4 – Once the time interval has ended, record the counter reading after the elapsed time.

5 – Subtract the two counts (final value – initial value) to obtain the number of pendulum oscillations during the time interval.

6 – Use a calculator (e.g., on your phone) to determine the pendulum period, that is, the duration of one complete oscillation, and to calculate the acceleration of gravity at the pendulum’s location using the following formula:

g = 4π²L / T²
Where L is the length of the pendulum - in this case 2677±0.5 mm - and T is the pendulum period you have just calculated.