What do you understand by forced vibration ? Draw a graph to show how the amplitude of forced vibration depends on frequency. Obtain the condition for resonance from this graph.

What do you understand by forced vibration ? Draw a graph to show how

1.	What do you understand by forced vibration ? Draw a graph to show how the amplitude of forced vibration depends on frequency. Obtain the condition for resonance from this graph.
Answer» Solution :1ST PART : N/A 2nd Part : The resonance takes place when the frequency of the FORCED vibration matches the natural frequency of a VIBRATING body. Here, the resonance is `f_0`. So, the required graph is as shown in FIG. 2.7.