Lecture Demos: Oscillations and Waves, 3A10.40

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Variable Angle Pendulum

 Variable Angle Pendulum

A physical pendulum is mounted on a bearing so the angle of the plane of oscillation can be changed. As you increase the angle, the frequency at which the pendulum swings will decrease.

PIRA Code(s): 
3A10.40
Set up time: 
none
Physics and Science Concepts: 
Oscillations
Operation: 
Push the pendulum so that it swings back and forth at an angle of about 0 ยบ. Then, slowly increase the angle, and watch the frequency decrease. For a more effective demonstration, start the pendulum at a relatively high angle, and then decrease the angle of the plane of oscillation so that the frequency of the pendulum will increase over time.
Safety: 
None

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