mechanical resonance

Mechanical resonance occurs when an external force causes an object or system to vibrate at a higher amplitude. This happens when the frequency of the external force matches the object's natural frequency of vibration.

When a system is disturbed from its equilibrium, it will naturally vibrate. If this vibration is driven by an external force at its natural frequency, the system absorbs energy rapidly, leading to a significant increase in vibration amplitude. This phenomenon is known as resonance.

Resonance can be observed in various systems, including mechanical structures like bridges, electrical circuits, and musical instruments. While it can be useful, for example, in tuning radio receivers, it can also be destructive, as seen in the collapse of the Tacoma Narrows Bridge due to wind-induced resonance. The frequency at which this maximum response occurs is called the resonant frequency.