Question

Which of the following works on the principle of forced vibration?
A. guitar
B. tuning fork
C. drum
D. all the above

Answer 1

Vibration is a mechanical phenomena that causes oscillations around a fixed point. The oscillations might be periodic, like those of a pendulum, or random, like those of a tyre on a gravel road. Vibration, on the other hand, is frequently unwelcome, squandering energy and producing undesired noises.

Complete answer:
The forced vibrations are the vibrations of a body that are caused by an external periodic force operating on it. The driving force is the external force that is applied. Depending on different parameters such as the quantity of driving force and resistive force, the frequency of driving force and real vibrations, and the phase of driving force and actual vibrations, the amplitude of a body oscillating under forced oscillations might decrease, remain constant, or increase.

In the presence of an external driving force, the body vibrates. The frequency of vibrations is determined by the vibration source as well as the frequency of the driving force.Vibration frequency may be altered by altering the frequency of the driving force. Vibrations can have a decreasing, rising, or stable amplitude. An oscillator will begin to vibrate if it is moved and then released.

A forced oscillation occurs when a force is applied continuously or repeatedly to keep the oscillation continuing. Forced vibration is an action in which an item is subjected to a periodic, repeated, and oscillatory force. The item is pushed to vibrate at the frequency of the applied force in this state. As a result, all vibrations are forced.

Hence option D is correct.

Note: A harmonic or non-harmonic disturbance can be used as the periodic input. A washing machine shaking due to an imbalance, transportation vibration generated by an engine or uneven road, or building vibration during an earthquake are all examples of various forms of vibration. The frequency of the steady-state vibration response resulting from the application of a periodic, harmonic input is equal to the frequency of the applied force or motion for linear systems, with the amplitude of the response being dependent on the particular mechanical system.