PASCO PS-2138 Goniometer - Manual (Page 9)

Model No. PS-2138 Goniometer
9 ®
Experiment
In this activity you will rotate your arm about your elbow and investigate
how the position, velocity and acceleration of your hand relate to the
angle, angular velocity and angular acceleration of your arm.
Part 1: Arc Length vs. Angle
When you rotate your forearm about your elbow (while keeping your upper
arm stationary) your hand traces out an arc, or part of a circle. You will use
a pen and white board to mark the path of your hand. The Goniometer will
measure the angle through which your forearm rotates.
Setup
1. Connect the Goniometer to the interface.
2. Mount the Goniometer on your elbow * so that a flexion of the joint is
measured as a positive angular displacement (as pictured below).
3. Stand next to the white board with your arm relaxed at your side. Let
your elbow and the back of your hand touch the board.
Equipment Part Number
Goniometer Probe PS-2138
Angle Sensor PS-2139
PASPORT interface or interfaces
(one multi-port interface or two single port interfaces)
See PASCO catalog or www.pasco.com
Motion Sensor PS-2103
Acceleration Sensor PS-2118, PS-2119 or PS-2136
Wall-mounted white board and pen
*If you are right-
handed, mount the
Goniometer on your
right elbow; if you
are left-handed,
mount it on your left
elbow.
Right Left
Flex
Extend