PASCO ME-8091 Wilberforce Pendulum - Manual (Page 10)

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Model No. ME-8091 Wilberforce Pendulum
9
10. Plug from the Laser Switch to digital channel 3 on the
ScienceWorkshop interface. For a picture of the complete setup,
see Figure 7.
11. Follow the DataStudio setup instructions in Appendices C
(ScienceWorkshop interfaces) and D (PASPORT interfaces.)
12. When you are ready to collect data, plug the Laser Diode into a
wall outlet. (Note: As a safety precaution, unplug the Laser Diode
and Laser Switch until just before you are ready to begin data
collection.)
Suggested Experiment: Investigating
Translational and Torsional Motion in a
Pendulum
This experiment has two parts: In Part I, you will investigate the
relationship between translational and torsional oscillatory motion in a
pendulum with a brass mass hanging from a spring. In Part II, you will
examine the effect of the inertia from a Photogate Wheel on a
pendulum.
Note: When using the Photogate Wheel, use the plastic masses instead
of the brass masses on the crossbar. If you attach the disk, you must
use the plastic, black masses on the crossbar because the brass masses
have too much rotational inertia. To change the period of the
pendulum’s oscillations, change the distance of the masses from the
center.
Part I: Effect of Mass on Oscillatory Periods in a Pendulum
1. Follow the equipment setup procedure described on pages 5-6 of this
manual.
2. Move the position of the masses on the crossbar until they are
equidistant from the centermost point on the pendulum bob.
3. Record the weight of the brass masses in Table 1. (Note: If a mass
balance is not available, see the Specifications section in Appendix
A.)
4. With a metric measuring tape, measure the distance of each mass
from the center point on the bob. Record your measurement in
Table 1.