PASCO PS-2138 Goniometer - Manual (Page 16)

Goniometer Experiment
16 ®
4. Hold the Acceleration Sensor in your hand with the sensor's X-axis
parallel to your forearm and pointing toward your elbow, and the
Y-axis orthogonal to your forearm and pointing in the direction that
your hand moves when you flex your elbow (as shown in the picture).
5. Measure the distance, r, from your elbow to the Acceleration Sensor.
r =
6. Hold your arm so that your forearm will rotate in a horizontal plane (as
pictured), and the X-Y plane of the Acceleration Sensor is also
horizontal.
Procedure
1. Extend your elbow.
2. Start data collection.
3. Quickly flex your elbow, wait a moment, then quickly extend your
elbow. *
4. Stop data collection.
Left Right
Y
X
Y
X
*The Acceleration
Sensor must remain
level (its X-Y plane
parallel to the floor)
throughout data
collection.