Question

What is periosic motion ? Give some example. How periodic motion can be used to measure time ?

Answer 1

Periodic motion refers to any movement of an object that is repeated in a given length of time.

Periodic motion is performed, for example
* by a rocking chair
* a bouncing ball
* a vibrating tuning fork
* a swing in motion

Some examples of periodic motion are
1. Rotation of earth about its axis (24 h).

2. Revolution of earth around the sun ( 365 days).

These type of periodic events are used to make clocks and calenders.

Answer 2

A motion that repeats itself after equal interval of time is known as periodic motion.
It's examples are 1) Rotation of Earth about its axis (24hrs).
2) Revolution of Earth around the sun (365days)
Periodic motion can be used to measure time by sundial and hourglass