We determined in class that the length of a pendulum seems to matter most - it seemed to have the greatest effect on the time for one complete swing of a pendulum (also known as the period). Angle mattered a little, but mostly if you were at an angle greater than 15 degrees (with respect to vertical).
For next class, prepare a data table for many trials. You'll be measuring time/period vs. length. In your data table, decide: the units for each column, whether or not you're timing one swing or multiple swings (and have a separate column for a single swing), enough space for 20 different lengths (and maybe multiple trials of each), etc. Also, prepare a short statement that describes your technique for measuring the time of swing (period).
Ultimately, you will produce a graph that suggests a mathematical relationship (if there is one to be found).
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