Question

what is vibratory motion ?

Answer 1

In vibratory motion,objects are forced to move with to and fro motion periodically.so the definition of Vibratory Motion is -a rapid to and fro movement from its mean position is known as Viratory Motion

Answer 2

Vibratory motion when an object is displaced from its fixed position and made to move to and fro periodically  it is known as vibratory motion ...