1.

Distinguish between free vibrations and forced vibrations.

Answer»
Free vibrationsForced vibrations
1. Free vibrations are produced when a body is disturbed from its equilibrium position and released.
Ex. Simple pendulum.
1. Forced vibrations are produced by an external periodic force.
Ex. Musical instrument having a sounding board.
2. The frequency of free vibrations depends on the body and is called its natural frequency.2. The frequency of forced vibrations is equal to that of the external periodic force.
3. The energy of the body remains constant only in the absence of friction, air resistance, etc.3. The energy of the body is maintained constant by the external periodic force.



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