In physics, simple harmonic motion is the repeated movement back and forth through an equilibrium, or center, position so that the maximum displacement on one side of this position equals the maximum displacement on the other side.
Each full vibration has the same time interval.
Characteristics of Simple Harmonic Motion:
The particle's acceleration in simple harmonic motion is directly proportional to its displacement and directed towards its mean location.
The particle's total energy is preserved as it moves in a simple harmonic motion.
SHM is a type of periodic motion.
A single harmonic function of sine or cosine can represent SHM.