Resonance takes place when external driving frequency equals the natural frequency of an object. I know every objects have their natural frequency. But I can't see everything vibrating on its own, maybe because of damping. Is that true?
If there was a planet where every friction is neglected, can an object vibrate in its natural frequency?
For an object to vibrate in natural frequency, like a pendulum, do we have to initially apply a momentum, not periodically, just to initiate the object to vibrate?
In Bartons pendulum, if the driver pendulum starts oscillating, the same length pendulum (I will take this as B) attached to the main string will starts to resonate. So already the B pendulum should vibrate on its natural frequency, that's why when external and equal frequency given it has started resonating. But if there is a hypothetical condition where natural frequency is totally dambed in pendulum B. If the driver pendulum starts to oscillate can pendulum B resonate?
And if the external forced frequency equals the natural frequency of an object which is at rest. First it will try to oscillate in natural frequency but as the forced frequency is continuously present there, it starts resonating instead of vibrating at natural frequency. Is this true?