What is simple harmonic motion ? 

The simple harmonic motion is defined as the periodic motion in which restoring force is directed towards mean position and directly proportional to displacement from mean position


What is amplitude? 

The maximum displacement of the particle from mean position performing simple harmonic motion is called as amplitude


What is frequency? 

The number of oscillation completed by the particle in one second performing simple harmonic motion is called as frequency


What is ideal simple pendulum ? 

It is defined as heavy point mass suspended by a weightless, iextensible string from rigid support called as ideal simple pendulum


What is practical simple pendulum ? 

It is defined as a metal sphere suspended by a light and inextensible string from rigid support