The rear view mirror of a motor bike starts vibrating vibrating violently at some particular speed of the motor bike. What is the name of the phenomenon taking place? Why does the happen?

The rear view mirror of a motor bike starts vibrating vibrating violen

1.	The rear view mirror of a motor bike starts vibrating vibrating violently at some particular speed of the motor bike. What is the name of the phenomenon taking place? Why does the happen?
Answer» 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. 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.