Question

What do you understand by the natural vibrations of a body ? Give one example.

Answer 1

Free vibrations of an elastic body are called natural vibrations and occur at a frequency called the natural frequency. Natural vibrations are different from forced vibrations which happen at frequency of applied force (forced frequency). If forced frequency is equal to the natural frequency, the amplitude of vibration increases manyfold. This phenomenon is known as resonance.^[2]

A plucked guitar string is an example of free vibration or natural vibration.