# Determining the number of oscillations

# How many oscillations should you do?

You chose a number of oscillations based upon observation to figure out how many trials, but now we should revisit that to determine if that is the *best* number of oscillations. We, therefore, add a sheet to our workbook that looks like the figure below:

You have:

- Various number of oscillations you might try.
- The number of trials you will do for each number of oscillations as you determined in the previous part.
- The average and standard deviation of the total time for each number of oscillations.

From these averages you can convert to the period: if the total time for 5 oscillations is 10s, then the period is 10s/5 = 2s. One of the questions asks you about the uncertainties. You can also look at the percent uncertainty in the period. Using all of these data, choose a number of oscillations you want to use.