**Simple Harmonic Motion:**

The to and fro motion of a particle about a mean
position on a fixed path such that the acceleration of the particle is always
directed to the mean position and is directly proportional to the displacement
of the particle from its mean position is called Simple harmonic motion.

1. A constant time period (T) (or) a constant frequency υ = 1/T

**Characteristics of SHM:**1. A constant time period (T) (or) a constant frequency υ = 1/T

2. An amplitude (A)

3. A constant mechanical energy which is the sum
of potential energy and Kinetic energy at every point in the path of
oscillation.
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