Advertisements
Advertisements
Questions
Differentiate between the forced and resonant vibrations.
State two differences between forced and resonant vibrations.
Advertisements
Solution
| Forced Vibrations | Resonant vibrations |
| These are vibrations of a body under an external periodic force of frequency different than the body's natural frequency. | These are vibrations of a body under an external periodic force of frequency exactly equal to the natural frequency of the body. |
| The amplitude of the vibration is usually small. | The amplitude of vibration is very large. |
| The body's vibrations are not in phase with the external periodic force. | The vibrations of the body are in phase with the external periodic force. |
| These vibrations last very short after the periodic force has ceased to act. | These vibrations last long after the periodic force has ceased to act. |
Notes
Students should refer to the answer according to their questions.
APPEARS IN
RELATED QUESTIONS
Distinguish between the free (or natural) and forced vibrations.
In following figure shows A, B, C and D are four pendulums suspended from the same elastic string XY. Lengths of pendulum A and D are equal, while the length of pendulum B is smaller and the pendulum C is longer. The pendulum A is set into vibration.
(a) what is your observation? (b) Give reason for your observation.
A vibrating tuning fork, held over an air column of a given length with its one end closed, produces a loud audible sound. Name the phenomenon responsible for it and explain the observation.
When a body vibrates under a periodic force, the vibrations of the body are ______.
What do you understand by free (or natural) vibrations?
What are the factors that affect the frequency of a vibrating string and how do they affect the frequency?
When the stem of vibrating tuning fork is pressed on a table, the tabletop starts vibrating. These vibrations are definitely an example of ______.
