Question

Resonance is a special case of $\underset{–}{}$ vibrations, when frequency of the driving force is$\underset{–}{}$ natural frequency of the body.

• A. forced, equal to the
• B. particle , more then the
• C. wave, equal to the
• D. forced, less than the

Answer 1

The correct option is A forced, equal to the

Resonance is a special case of forced vibrations, when frequency of the driving force is equal to the natural frequency of the body.
Resonance is the result of an external force vibrating at the same frequency as the natural frequency of a system. Natural frequency is a characteristic of every machine, structure and even animals. Often, resonance can be confused with the natural frequency or critical frequency. If equipment is operating in a state of resonance, the vibration levels will be amplified significantly, which can cause equipment failure and plant downtime. It is, therefore, important that the running speed of equipment be out of the resonance range.