PASCO ME-9833 Physical Pendulum Set - Manual (Page 16)

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Model No. ME-9833 Physical Pendulum Set
16
4. Use a mounting screw to attach the disk to the shaft of the sensor through a hole on the
edge of the disk.
Computer Setup: Period of Oscillation
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).
3. Open the ‘Setup’ window and increase
the sampling rate from 10 Hz to 100 Hz.
4. Open the Calculator and select
‘period(10,10,1,x)’ from the ‘Special’
menu in the Calculator. [This function
determines the period of oscillation
from the angular position versus time data.]
5. To define the variable ‘x’ in the Calculator, click the menu down arrow under ‘Variables’
and select ‘Data Measurement’. Select ‘Angular Position’ from the window that opens.
6. Click ‘Properties’ in the Calculator window. Give the function ‘Period’ as the
measurement name and the variable name. Enter ‘sec’ (seconds) as the unit.
7. Create a graph of ‘period versus time’. Click and drag the Graph icon from the Displays
list in the Summary panel to the period function in the Data section of the Summary panel.
8. In the ‘Statistics’ menu of the ‘period versus time’ Graph display, select ‘Mean’. Click the
‘Statistics’ button in the toolbar so that the legend box will show both the data run and the
mean.
Data Recording: Period of Oscillation
1. Gently start the disk 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. Repeat the process for several more trials. Determine the average of the values of the
period of oscillation and record the average value in the Data Section.
Figure 3-2: Calculator window