The periodic vibrations of a body in the absence of any external force is called:
damped vibration
natural vibration
resonant vibration
forced vibration
When a body vibrates under a periodic force, the vibrations of the body are :
(a) natural vibrations (b) damped vibrations
(c) forced vibrations (d) resonant vibrations.
When a body vibrates under a periodic force, the vibrations of the body are called natural vibrations.