Vibration is the rapid back-and-forth movement of physical particles as a reaction to different forces.

Vibration involves the disruption of something from its equilibrium point. This is a balanced state between opposing forces.

Vibration is usually discussed in the creation of sound.

Vibration can encompass free vibration or forced vibration.

Free Vibration

This is a type of vibration in which a force is applied to an object once and is allowed to vibrate at its frequency.

An example of free vibration is a guitar string being played.

Forced Vibration

Forced vibration is a type of vibration in which a force is repeatedly applied to an object to maintain the vibration.

The vibration of a moving vehicle is forced vibration caused by the forces from the road, springs, and engine.

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