Physics Lectures Practice Session Testing Mode Video No. 20

Testing Mode Video No. 20 Module # 16 Simple Harmonic Motion There is a special type of vibratory motion known as simple harmonic motion and it plays an important role in wave motion. The type of vibratory motion in which the acceleration is proportional to the displacement and always directed towards the equilibrium position (mean position) is called simple harmonic motion (). Note again that equilibrium position and mean position are the same thing. Hence, the vibrating motion of a mass attached to a spring is known as simple harmonic motion. Alternatively, in executing a simple harmonic motion, the magnitude of the acceleration of a vibrating body is always directly proportional to the displacement from the mean position and direction of acceleration is always directed towards the mean position. Examples of (a) Motion of simple pendulum. (b) Motion of a swing. (c) Motion of a body hanging from a spring. (d) Motion of a body attached to one end of a spring whose othe