There are the following differences between forced vibration and free vibration.
|S.N.||Forced vibration||Free vibration|
|1.||When a body vibrates with the help of an external periodic force, then this type of vibration is called forced vibration.||When a body vibrates with its own natural frequently without the help of any external periodic force, then this type of vibration called free vibration.|
|2.||Examples of forced vibration are the sounding bodies i.e., a loudspeaker is driven by an ac signal coming from an amplifier.||An example of such vibration is a simple pendulum vibrating in a vacuum.|
|3.||The amplitude of vibration decreases gradually over time.||The amplitude of vibration remains constant for a long period of time.|