• Equipment and Setup
• TA Notes
• Data, Results and Graphs
• Answers to Questions
• Lab Manual
• CUPOL Experiments

The equipments used in this experiment are: Pendulum, pendulum clamp, support rod, photogate, meter stick (see Figure 1). To hang the pendulum from the support rod , do not tie knots in the string. You may follow the way in figure 2 to hang the pendulum. The center of the cylinder should be about 0.2m above the table top (Figure 3). Adjust the postion and height of the pendulum as well as the photogate so when you release the pendulum, it can swing through the photogate back and forth without hitting it (see Figure 4). Use the "Pendulum Timer" program from the Lab folder to take measurement on swing time (Figure 5).

[Click on images to enlarge.] 1 2 3 4 5

• Perform the experiment ahead of time!
• To hang the pendulum from the support rod , do not tie knots in the string. You may follow the way in figure 2 to hang the pendulum.
• Students will find it helpful if you explain to them it doesn't matter where they choose the reference position to measure Ht and Hb.
• You may tell the students to repeat their measurements in Part II until they find the T that gives reasonable percent difference.
• Although Excel is not required in this experiment, you can tell the students if they use Excel (especiall when filling the table in Part II) to calculate, they can save a lot of time !

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The Lab Manual for this experiment does not exist on-line.

Take a look at these CUPOL experiments for an on-line laboratory experience:

• Vernier caliper tutorial