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Answer» ESSAY ON PERIODIC MOTION
Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a BOUNCING ball, a vibrating tuning fork, a swing in motion, the Earth in its ORBIT around the Sun, and a WATER WAVE. In each case the interval of time for a repetition, or cycle, of the motion is called a period, while the number of periods per unit time is called the frequency. Thus, the period of the Earth’s orbit is one year, and its frequency is one orbit per year. A tuning fork might have a frequency of 1,000 cycles per SECOND and a period of 1 millisecond (1 thousandth of a second).
EXAMPLE OF NON PERIODIC MOTIN
1. Swaying of the branches of a tree
2. Motion of a bouncing ball under the action of gravity and friction
3. The running of a batsman between the wickets
4. Motion of the pestle in a mortar when operated manually.
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