3A10.10 Adjustable Length Pendulum
Simple harmonic motion, conservation of energy
A ball is suspended from a pivot so that it can swing freely. The length of the pendulum is adjustable. For small amplitude, the motion of the pendulum as a function of time is approximately simple harmonic motion. Also, the pendulum can be used to show conversion of potential to kinetic energy.
-  Ball attached to a string
-  Lab stand
-  90-degree clamp
-  Screw clamp (used as a pivot)
- Suspend the string on a screw clamp.
- Attach the screw clamp to a lab stand.
- Adjust the length of the pendulum as necessary.
- Displace the ball sideways from its equilibrium position and release it.
- PIRA 3A10.10
- 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.