Question

The diagram shows the displacement-time graph for a vibrating body. Name the type of vibration produced by the vibrating body :

Answer 1

The vibrating body is showing the damped vibration as in the diagram the amplitude goes on decreasing with increasing time.

Damped vibrations are the periodic vibrations of decreasing amplitude in the presence of resistive force. The amplitude of motion decreases due to the friction (or resistive) force which the surrounding medium exerts on the body vibrating it. Due to this resistive force, the vibrating body continuously loses its energy in doing work against the force of friction and so its amplitude gradually decreases.