Determine the formula for the period of a pendulum. The period is defined as the time required for a complete out-and-back swing.
Measuring the period: The easiest way to measure the period accurately is to measure the time for a large number of swings and divide by this number to determine the time required for one complete swing. In this investigation, measure the time for ten complete swings and divide by ten to determine the period of the pendulum (a single swing).
Measuring the length of the pendulum: Measure the length from the pivot point to the center of mass of the paperclip / washer assembly.