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Rotation<br />
Torsion Pendulum<br />
Aluminum Disk from CI-6691<br />
Rotational Accessory<br />
Optical<br />
Encoder<br />
Rotary<br />
Motion<br />
Sensor.<br />
See pages<br />
2 and 5.<br />
A Force Sensor is used to pull on a string wrapped around<br />
the pulley, creating a real-time plot of torque versus angular<br />
displacement.<br />
Torsion Wire<br />
The slope of the<br />
resulting straight line<br />
is the torsional spring<br />
constant.<br />
Bicycle Gyroscope<br />
From a plot of amplitude versus time, the period of the<br />
torsional pendulum can be determined.<br />
Conservation of Angular Momentum<br />
ME-6837<br />
Precision ball bearings result in extremely low-friction for both<br />
the Bicycle Gyroscope and the Rotating Chair.<br />
Wrap rope around<br />
groove to apply<br />
torque.<br />
Non-marking<br />
Rubber Tire<br />
Order Information:<br />
Torsion Pendulum Accessory ...................................ME-6694<br />
Required:<br />
Rotary Motion Sensor .....................................................CI-6538<br />
ScienceWorkshop 750 Interface .................................................................p. 2<br />
DataStudio Software ............................................................................................p. 4<br />
See page 109 for Rod and Base.<br />
Use a photogate (not included) with built-in spokes<br />
to measure the rotational speed and acceleration<br />
Bicycle Gyroscope Mass Set<br />
ME-6972<br />
Adding masses to the wheel increases its<br />
rotational inertia by over 60%.<br />
Mass securely clamps to the wheel<br />
rim using included screws.<br />
Order Information:<br />
Bicycle Gyroscope Mass Set ...................................ME-6972<br />
(Includes four 400 g masses)<br />
Steel Base<br />
This 6 lb. Bicycle Gyroscope<br />
has a solid 1/2” steel shaft<br />
with cushioned hand grips.<br />
Includes pull-cord to spin up<br />
the wheel.<br />
Rugged design and incredibly low-friction make<br />
this far superior to any office chair.<br />
Order Information:<br />
Bicycle Gyroscope ............................................................................ME-6837<br />
Rotating Chair ........................................................................................ME-6856<br />
(Includes platform & chair)<br />
Shown in use with:<br />
Photogate Head ....................................................................................ME-9498A<br />
42<br />
www.pasco.com/engineering
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