3A70.25 Spring-Coupled Pendula
Two pendula oscillate, coupled together by a spring. The moments of inertia of the pendula can be adjusted by moving two masses. The coupling can be changed by changing the pivot separation and coupling points.
-  Rotational motion sensor
-  Pendulum rod with mounting hardware
-  Mass with set screw
-  Spring with clamps
-  Lab stand
-  90-degree clamp
-  Aluminum rod
- (Optional)  Computer with Logger Pro
- (Optional)  LabPro or LabQuest Mini system
- Mount the aluminum rod between the lab stands using the 90-degree clamps.
- Mount the rotational motion sensors on the aluminum rod.
- Attach the pendulum rods to the motion sensors.
- Attach the spring and the masses to the pendulum rods.
- (Optional) Connect the LabPro or LabQuest mini system to the motion sensors and the computer. If using the LabPro system, plug it into mains power.
- Start with one pendulum stationary and the other moving.
- (Optional) Take data using Logger Pro.
- Observe the time evolution of the system.
- Change the system in some way (moment of inertia, coupling, initial conditions) and repeat the experiment.
- PIRA 3A70.25
- Don't attempt this at home!
If you have any questions about the demos or notes you would like to add to this page, contact Ricky Chu at ricky_chu AT sfu DOT ca.