Activity: Resonance

An oscillating system is said to be forced when driven by an external, varying force, An example of this is a hanging spring that can either be allowed to vibrate on its own at its natural frequency (free vibration) or forced to vibrate by you moving your hand up and down. When forced to vibrate at its own natural frequency a system will oscillate at a large amplitude. If you sing at the natural frequency of a wine glass...

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