Physical pendulum: Steel bar with two pivot points.

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(B)Waves - B+10: Simple Harmonic Motion

Oscillations: The Physical Pendulum. The heavy steel bar can be suspended on either one of the knife blades. The knife blades rest on a solid pivot support. The period will be the same in both cases.
UCB Index: 
B+10+10
PIRA Index: 
3A15.20
Demo Diagram: 

UCB Taxonomy:

PIRA Taxonomy:

appletURL: 
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B+10+15 Ball rolling in a spherical dish on OHP.