If a body is in vacuum and clamped at one point when disturbed slightly from its rest position , starts vibrating. It vibrates in its natural frequency and constant amplitude.
So if we are disturbing the body slightly and the natural frequency of the body is its say 5Hz then the body will start vibrating at 5Hz. So where does the body get the energy to vibrate at 5Hz , because since we are not doing much work in disturbing the body the energy given to the body by us is not much right?, it is enough to make it vibrate in its natural frequency? Where does the body gets energy to vibrate in its natural frequency?
I am in 10th standard so it would be helpful if anyone answers the question based on it.