What are damped vibrations

1. What are damped vibrations?
2. Give one example of damped vibrations.
3. Name the phenomenon that causes a loud sound when the stem of a vibrating tuning fork is kept pressed on the surface of a table.

Answer

(i) The periodic vibrations of decreasing amplitude due to the presence of a resistive force are called as damped vibrations.

(ii) Examples:

• A vibrating tuning fork in air
• Oscillations of a simple pendulum in air
• A slim branch of a tree pulled and released

(iii) Forced vibration or resonance