SIMPLE HARMONIC MOTION: DEFINITION, EQUATIONS, RELATIONS EXECUTING SIMPLE HARMONIC MOTION What is Simple Harmonic Motion? Simple Harmonic Motion (SHM) is defined as a to and fro of motion of an object about a mean position. The motion of a body is said to be simple harmonic if its acceleration is always, a) directed towards a fixed point (mean position) b) directly proportional to the distance from a fixed point. When a body is displaced in simple harmonic motion , a restoring force is set up. Due to this restoring force, the body comes back to its equilibrium, it gets kinetic energy and the body moves away from the equilibrium position. In this way, the body continuously oscillates back and forth about the mean position. Therefore, the motion is said to be a Simple Harmonic Motion (SHM) . Relation between acceleration and displacement of a particle executing simple harmonic motion (SHM): Consider a particle having mass 'm' moving with a uniform circular motion ...