Question

Define the term 'Periodic motion! Give two examples of periodic motions that
can be used to measure time.​

Answer 1

Answer:

Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, bouncing a ball.

Answer 2

Periodic motion means that in which the object comes back to the same position at some interval of time
Examples- A boy swinging on a swing.
Revolution of the earth