Is there anyone to help this girl
Answers
Answer:
(i) *.*When a vehicle is driven, the piston of the engine makes to and fro motion at a frequency depending upon the speed of the vehicle. The 'vibrations' caused by the movement of piston are communicated to all parts of the vehicle*.*
=> It is possible that at a certain "speed of the motorbike" the rear view mirror may have natural frequency of vibration equal to to and fro motion of the piston. At this particular speed of the bike, the rear view mirror "starts vibrating vigorously due to RESONANCE".
(ii) The phenomenon associated with this observation is RESONANCE.
Resonance - resonance is a special case of forced vibrations, when the frequency of the externally applied periodic force on a body is equal to its natural frequency, the body readily begins to vibrate with an increased amplitude.
(iii) If the rear view mirror is not tightly fixed, then such vibrations may cause the part to drop out.
To stop these vibrations,
• speed of the motorbike must be changed so that the resonance is disturbed.
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Hope this helps!