Write short notes on two springs connected in series.

Explanation

Phase: The phase of a vibrating particles at any instant completely specifies the state of the particle. It expresses the position and direction of motion of the particle at that instant with respect to its mean position the phase of the vibrating particle. At time `t=0s` (initial time), the phase `phi=phi_(0)` is called epoch (initial phase) where `phi_(0)` is called the angle of epoch.