Driven harmonic oscillator: Motor driven mass on spring.

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(B)Waves - B+20: Forced Oscillations

Driven harmonic oscillator: Motor driven spring with mass. Vary the motor speed with the speed controller. At resonance, the metal collar vigorously hits the stop.
UCB Index: 
B+20+0
PIRA Index: 
3A60.40
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B+20+5 Clock spring oscillator: Electrically driven and damped.