Question

Suggest one way by which rattling sound could be stopped.
(a) Rattling sound can be stopped by changing the speed of the vehicle.
(b) Rattling sound can be stopped by changing the frequency of the vehicle.
(c) Rattling sound can be stopped by changing the vibration of the vehicle.
(d) None of the above

Answer 1

Hint: Resonance happens once a material oscillates at a high amplitude at a specific frequency. We tend to call this frequency resonant frequency. A development during which an external force or a vibratory system forces another system around it to vibrate with a much bigger amplitude at a nominal frequency of operation.

Complete step-by-step solution:
Every natural frequency of the thing is expounded to one of the varied wave patterns by which the object may vibrate. The natural frequencies of an instrument square measure are generally observed due to the harmonics of the instrument.
An instrument is forced into moving at one in every one of its harmonics (with one amongst its undulation patterns) if another interconnected object pushes it with one of those frequencies. This could be called resonance — once one object moving at the constant natural frequency of a second object forces that second object into vibration motion.
It happens thanks to the resonance. Once a vehicle is driven, the piston of the engine makes in and out motion at a frequency relying upon its speed. The vibrations caused by the movement of the piston are transmitted to any or all components of the vehicle. It's simply attainable that some components of the vehicle (or its frame), might need a natural frequency of to and fro movement of the piston at the sure speed of the vehicle. Once this happens, then at this explicit speed of the vehicle that half starts vibrating smartly due to the resonance. So now we will say why this rattling sound occurred. Whenever this kind of condition happens then we are going to suffer from this.
Now the next part is how the rattling sound can be stopped.
So for solving this problem we have to alter the speed of the vehicle so the condition of the resonance won’t occur. Hence, option A is correct.

Note: Resonance happens once a system is prepared to store, and easily transfers energy between two or a lot of totally different storage modes (such as mechanical energy and potential energy within the case of a straightforward pendulum). However, there are some unit losses from cycle to cycle, referred to as damping. Once damping is small, the resonant frequency is around adequate the natural frequency of the system that might be a frequency of unforced vibrations. Some systems have multiple, distinct, resonant frequencies.