Equipment setup, Procedure – PASCO PS-2120A Rotary Motion Sensor User Manual
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R o t a r y M o t i o n S e n s o r
E x p e r i m e n t 1 : R o t a t i o n a l I n e r t i a o f a P o i n t M a s s
6
E x p e r i m e n t G u i d e
Equipment Setup
1.
Attach a mass on each end of the rod (part of the
Mini-Rotational Accessory) equidistant from the rod
center. You may choose any radius you wish.
2.
Tie one end of a thread to a Mass Hanger and tie the
other end to one of the levels of the 3-step Pulley on
the Rotary Motion Sensor (RMS).
3.
Mount the rod and masses to the pulley on the Rotary
Motion Sensor. Please note the orientation of the
3-step Pulley.
4.
Mount the RMS on a support rod and connect it to a
PASPORT-compatible interface. Make sure that the
support rod does not interfere with the rotation of the
rod and masses. See Figure 1.1.
5.
Mount the Super Pulley wish Clamp on the end of the
Rotary Motion Sensor.
6.
Drape the thread over the Super Pulley such that the thread is in the groove of the pulley and the Mass
Hanger hangs freely (see Figure 1.1).
Note: The Super Pulley with Clamp must be adjusted at an angle,
so that the thread runs in a line tangent to the point where it leaves
the 3-step Pulley and straight down the middle of the groove on the
clamp-on Super Pulley (Figure 1.2).
7.
Adjust the Super Pulley height so that the thread is level with
the 3-step pulley.
8.
Connect the Rotary Motion Sensor to the interface and turn the
interface on.
Procedure
Part 1: Measurements for the Theoretical Rotational Inertia
1.
Weigh the two masses from the ends of the thin rod to find the total mass M
total
and record the value in Data
Table 1.
2.
Measure the distance from the axis of rotation to the center of the masses and record this radius in Data
Table 1
Data Table 1: Theoretical Rotational Inertia
Total Mass
Radius
T
mg
a
Rod and Masses
3-Step Pulley
Rotary Motion
Sensor
Super Pulley with
Clamp
Hanger
and Mass
Thread
Support
Rod
Rod
Clamp
Figure 1.1: Rotary Motion Sensor and
Free Body Diagram
Super
Pulley
Figure 1.2: Super Pulley Position