I learned that the phenomena of resonance occurs when the frequency of the applied force is equal to the natural frequency of an object. At this point, an object vibrates with maximum amplitude.
How can a force have a frequency? My teacher used the analogy of pushing a child on a swing. The person who pushes should apply a force of the same frequency of the swing (I didn't really get that).
Following the analogy, what if the person pushes harder, wouldn't the "amplitude" of the swing be larger... I mean is there any such thing a "maximum amplitude" for a vibrating object as I can always increase the magnitude of the force.
Do all objects always vibrate with some kind of frequency? I mean if I put a speaker in front of a goblet and produce a sound having a frequency equal to the "natural frequency", it will just start vibrating with maximum amplitude?
I know I asked a lot of questions at once but I am really confused about this phenomena and just cannot get the intuition behind it.
No comments:
Post a Comment