What is meant by periodic and non-periodic motion ? Give any two examples , for each motion ?

Explanation

1. Periodic motion :
Any motion which repeats itself in a fixed time interval is known as periodic motion.
Examples : Hands in pendulum clock , swing of a cradle , Hands in pendulum clock , swing of a cradle , Hart beat of a person , the revolution of the Earth around the Sun , waxing and waning of Moon, etc.
2. Non - Periodic motion :
Any motion which does not repeat itself after a regular interval of time is known as non-periodic motion .
Example : Occurance of Earth quake , eruption of volcano etc.