The rear view mirror of a motor bike starts vibrating violently at som

1.	The rear view mirror of a motor bike starts vibrating violently at some particular speed of the motor bike.
Answer» (i) The frame of a motor cycle along with the rear view mirror is found to vibrate viotently when it is driven to a particular speed. This happens when the frame has the natural frequency of vibration equal to that of the piston when the engine is driven at that particular speed. (ii) This phenomenon is called ‘resonance’. In this phenomenon when a body begins with the natural frequency of the others vibrating body B, then A begins to vibrate violently with the maximum amplitude. (iii) This can be stopped by mounting the engine on such a structure, say steel springs that absorbs the vibrations of the engine without communicating them to the frame and in this condition the rear view mirror attached to the frame will not vibrate violently.

The rear view mirror of a motor bike starts vibrating violently at some particular speed of the motor bike.

Answer»

(i) The frame of a motor cycle along with the rear view mirror is found to vibrate viotently when it is driven to a particular speed. This happens when the frame has the natural frequency of vibration equal to that of the piston when the engine is driven at that particular speed.

(ii) This phenomenon is called ‘resonance’. In this phenomenon when a body begins with the natural frequency of the others vibrating body B, then A begins to vibrate violently with the maximum amplitude.

(iii) This can be stopped by mounting the engine on such a structure, say steel springs that absorbs the vibrations of the engine without communicating them to the frame and in this condition the rear view mirror attached to the frame will not vibrate violently.

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