What is oscillatory motion? Give its examples.

Explanation

If a body moves to and fro back and forth or up and down about a fixed point in a definite interval of time, such a motion is called an oscillatory motion.
For example :
(1) A ball placed in a bowl will be in equilibrium at the bottom. If displaced a little from the point, it will perform oscillatory in the bowl.
(2) The motion of the pendulum of a wall clock is oscillatory motion.
(3) The motion of a loaded spring, when the load attached to the spring is palled once a little from its mean position and left to itself.
Every oscillatory motion is periodic, but every periodic motion need not be oscillatory.
Restoring force is produced in such type of motion hence no external force constantly needed for continuation this motion.
Such type of motion is also known as harmonic motion.