Harmonic Motion

Harmonic Motion is a periodic motion that exactly repeats itself after equal intervals. A simple harmonic motion is an oscillatory motion in a straight line from one side to another of a fixed point in the line called the centre. The rate of change of its speed is proportional to its distance from the centre, the special terms of the proportion settling the period or time taken for the moving point to perform a complete cycle in its path of motion. Its greatest distance from the centre is called the amplitude, variations in which will not affect the period of oscillation. The study of harmonic motions is of much importance in oscillations of all kinds, such as those of matter transmitting sound or of ether transmitting radiation.