Define simple harmonic motion ? Give two examples.

Explanation

Simple Harmonic Motion: A body is said to be in S.H.M if its acceleration is directly proportional to its displacement, acts opposite in direction towards a fixed point.
Exmaples :
1) Projection of uniform circular motion on a diameter.
2) Oscillations of simple pendulum with small amplitude.
3) Oscillation of a loaded spring.
4) Vibrations of a liquid column in U-tube.