Question

What is SHM in Physics?

Answer 1

1. A to-and-fro motion of a particle around a mean position in which the particle moves on either side of the equilibrium (or) mean position is referred to as an oscillatory motion. It's a type of periodic motion with two extreme points.
   
2. Simple harmonic motion is an oscillatory motion in which the particle's acceleration and force are directly proportional to its displacement from the mean location at each point. It is a special case of oscillatory motion.
3. Mathematical expression for the force acting on the particle
   $$\begin{gathered} \overrightarrow{F}\propto -\overrightarrow{x} \\ \overrightarrow{a}\propto -\overrightarrow{x} \end{gathered}$$
   where, $\overrightarrow{F}$ is the force, $\overrightarrow{a}$is the acceleration, $\overrightarrow{x}$is the displacement.
4. 
5. The maximum displacement of the particle is called the amplitude of motion.
6. At the mean position, the energy is entirely kinetic energy. At the extreme position, the energy is entirely potential energy.
7. The most common examples of SHM are simple pendulum and spring-mass systems.