# Pendulum Lab Essay

578 Words3 Pages
Pendulum Lab Conclusion In this experiment, we first tied a mass to a length of fishing line. We then set up a stand on which we could drape the mass over with relative stability. We used two fishing lines with the same length, but one with a 50g mass attached to it, and another with a 75g mass attached. We pulled both to the same height and released them simultaneously and observed their swinging motion in order to determine whether or not mass had an effect on the period of a pendulum—since both masses swung at the same rate, mass had no effect on the period of a pendulum. We removed one of the fishing lines, and timed how long the pendulum would take to swing back and forth ten times (ten periods). We chose to time it for ten periods rather than one because the data would be more reliable and consistent. After recording this time in our data table and dividing by the number of times we allowed the pendulum to swing (ten) to find the period, we repeated this process four more times, each time with a different length of string. We recorded the length and period for each of the five trials. Through both qualitative observation, and our quantitative data, we deduced that the shorter the length of a pendulum, the smaller its period. At the longest length 42cm, the period was 1.33s. Each progressing length: 33.5cm, 30cm, 22cm, and 11cm yielded smaller and smaller periods of 1.16s, 1.15s, 0.96s, and 0.68s respectively. In our first graph of Period vs. Length, we plotted the points and discovered that it formed a root curve. In our second graph, Period2 vs. Length, as we plotted the points, we discovered that the graph had become linear—this graph would also be able to find the length for any period. Both graphs consistently confirmed that the period of a pendulum is proportional to the root of its length. When we were given the equation to find the