Question

What is periodic motion ? State its two examples.

Answer 1

A motion which repeats at regular intervals of time is called PERIODIC MOTION....

For example ---->
                           rotation of hands of clock
                           Vibration of atoms in a molecule.
                           Oscillations of a simple pendulum

Answer 2

The motion repeated in equal intervals of time is called as Periodic motion. for example, by a rocking chair, a bouncing ball,etc.......