Question

The diagram below ment-time graph for a vibrating body.

(i) Name the type of vibrations a produced by the vibrating body

(ii) Give one example of a body producing such vibrations

(iii) Why is the amplitude of the wave gradually decreasing ?

(iv) What will happen to the vibrations of the body after some time? 

Answer 1

 (i) The diagram shows damped vibrations. 

(ii) A tuning fork vibrating in air. 

(iii) The amplitude of the wave decreases due to energy loss against frictional force which the surrounding medium exerts on the vibrating body. 

(iv) After some time the amplitude gradually decreases and finally the body stops vibrating.