PASCO ME-9833 Physical Pendulum Set - Manual (Page 12)

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Model No. ME-9833 Physical Pendulum Set
12
Measurement of Period for Different L
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Equipment Setup
1. Measure and record the length, L, of the bar.
2. Mount the Rotary Motion Sensor on a support rod so
that the shaft of the sensor is horizontal (parallel to the
table).
3. Use a mounting screw to attach the bar to the shaft of
the sensor through the first hole above the center hole of
the bar. In other words, attach the bar so the pivot point
is 2 cm above the center of gravity.
Computer Setup
1. Connect the sensor to a PASCO interface and connect the
interface to a computer.
2. On the computer, start the DataStudio program. Set up
the program so that it has a Graph display of Angular
Position (rad) versus Time (s).
Data Recording
1. Gently start the pendulum bar swinging
with a small amplitude (about 20 degrees
total).
2. Click ‘Start’ to begin recording data.
After about 25 seconds, click ‘Stop’ to
end recording data. Data will appear in
the graph of angular position versus time
and also in the graph of period versus
time.
3. Move the mounting screw to the next hole (4 cm from the center hole).
4. Start the pendulum bar swinging and record data for about 25 seconds.
5. Repeat the process for the holes that are 6 cm, 8 cm, 10 cm, 12 cm, and 14 cm from the
center hole.
Analysis
1. Create a Table display to show period versus length. In the ‘Experiment’ menu, select ‘New
Empty Data Table’.
Figure 2-2: Graph display
Figure 2-1: Setup