PASCO CI-6538 Rotary Motion Sensor - Manual (Page 20)

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Model No. CI-6538 Rotary Motion Sensor
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Procedure
Part I: Measurements for the Theoretical Rotational Inertia
1. Weigh the masses to find the total mass M
total
and record in Table 1.1.
2. Measure the distance from the axis of rotation to the center of the masses
and record this radius in Table 1.1 .
Part II: Measurement for the Experimental Method
a) Finding the Acceleration of the Point Masses and Apparatus
1. Open DataStudio and create an experiment.
2. In the Sensors list of the Experiment Setup window, click and drag the
Rotary Motion Sensor icon to the two digital ports that the RMS is
plugged into on the interface.
3. In the Experiment Setup window, double click on the Rotary Motion
Sensor icon to open the Sensor Properties dialog.
4. In the Measurement tab of the Sensor Properties dialog, select "Angular
Velocity (rad/s)."
5. In the Rotary Motion Sensor tab, select 360 divisions/rotation, and
choose the appropriate pulley in the Linear Calibration menu; click OK.
6. Put the 50 g mass on the Mass Hanger and wind up the thread. Click
on the Start button; then release the 3-step Pulley, allowing the mass to
fall. Click the Stop button to end the data collection.
HINT: Click the Stop button before the mass reaches the floor or the end
of the thread to avoid erroneous data.
7. In the Graph Display window, click on the Statistics button; then select
the linear curve fit from the pop-up menu.
The slope of the linear fit represents the angular acceleration (
α) and should
be entered in Table 1.2.
Total mass
Radius
Table 1.1:Theoretical Rotational Inertia Data