What is an oscillating system? Give examples of oscillatory systems.

Systems of bodies in which free oscillations are possible are called oscillatory systems. Each oscillatory system has a state of stable equilibrium, relative to which oscillations occur. If you take the oscillatory system out of a state of stable equilibrium, then a force always appears, directed in the opposite direction to the deviation (displacement). Under the influence of this force, the system seeks to return to its initial stable state. For example, a body suspended from a spring or a thread, the branches of a tuning fork vibrate if these bodies or branches of a tuning fork are removed from the state of the equilibrium device – to stretch the spring, deflect the ball on the thread from a vertical position, hit the tuning fork branches with a hammer.