PASCO ME-9821 Centripetal Force Pendulum - Manual (Page 8)

®
Model No. ME-9821 Centripetal Force Pendulum
7
Experiment 1 - Centripetal Force of a
Pendulum
1. Connect the Rotary Motion Sensor and Force Sensor to an appropriate
PASCO interface (Follow the experiment setup instructions described
on pages 5-6 in this manual.)
2. Zero the Force Sensor while the pendulum with mass is hanging
straight down at rest. (If using a PASPORT PS-2104 Force Sensor,
push the Zero button; If using a CI-6746 Force Sensor, push the
Tare button.)
3. In DataStudio or other software, click the Start button to begin data
recording.
4. With one hand, pull the pendulum back (Note: Simultaneously, use
your other hand to hold the Force Sensor cord out of the way or
tape down the cord to your tabletop.) and release it. Let the
pendulum oscillate a few times to allow enough time for any
vibrations perpendicular to the plane of oscillation to damp out.
Then stop recording.
5. With a metric ruler, measure the length of the pendulum from the
axis of rotation to the center of the clamp-on mass. Use a balance
scale to measure the mass of the clamp-on mass.
6. In your data acquisition software (such as DataStudio or
ScienceWorkshop software), measure the force at the time of the
maximum speed. Measure the maximum angular speed. Record
your results for each angle in Table 1a.
7. Repeat steps 1-10 using a different inital release angle to cause a
different maximum speed. Record your results in Table 1a.
Data Recording
a) mass (kg) attached to the rod__________
b) length (m) from rotational axis to the center point of mass _______
Note: If a balance scale
is not available, see the
mass specifications in
Appendix A of this man-
ual.
Note: The angular
velocity, the angle at
which you released the
pendulum, and the force
of the pendulum are
recorded in DataStudio
(or other PASCO data
acquisition software)
provided that the Rotary
Motion and Force Sen-
sors are connected to the
interface during data
collection.