phy121
Your 'pendulum counts in-class' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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Report one line per observation. Each line should consist the length of the pendulum being observed, the 1-minute count and the scale factor by which your reported length should be multiplied to get the length of the pendulum in centimeters. The three requested quantities should be separated by commas. Each line should therefore consist of three numbers, separated by commas. Don't include any words, units, or other information in any of these lines.
You may report as many lines as possible. Use the space below.
Your data report (start on the next line):
3.5, 90, 2.54
6, 70, 2.54
12, 53, 2.54
18, 43.5, 2.54
Add your description of how you made your observations. Include an explanation of how much uncertainty there was in each observation, and explain how you arrived at your uncertainty estimate.
Your explanations (start on the next line):
Clock time was measured using a stop watch, which was started when the pendulum was on the left side of my body and stopped once the stop watch was at one minute. A ruler measured in inches was used to obtain my initial lengths for the string on the pendulum. The index finger of my right hand was used to hold the string. I counted each full cycle of the pendulum, with a full cycle being when it returned to the left side of my body. The percent of uncertainty would be +/- ½ on the pendulum counts when the counts where counted in full cycles, as well as the difference in human error in starting the pendulum at the same rate each time. The ruler used to measure my initial lengths could also count for a percent of uncertainty. The ruler was obtained from an elementary school desk label for second grade.
&#Good responses. Let me know if you have questions. &#