Question

Which of the following shows a periodic motion?

• A. Simple pendulum
• B. Boy running on an irregular path
• C. Boy running in a straight line
• D. Girl dancing

Answer 1

The correct option is A Simple pendulum

A motion that repeats itself at regular intervals of time is called periodic motion.
The to-and-fro motion of a simple pendulum is an example of periodic motion (or oscillatory motion).

Other examples of periodic motion are, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun etc.