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Classification of oscillatory movements of the body depending on the current at him strength

On oscillating point definitely applies returning force. Fluctuations, commits a material point (body) under the action of only one restoring force, call intrinsic vibrations of the point (body).

Note, that the natural vibrations of the body in practice never happen, since the oscillating body is always valid even the power of the medium resistance (the friction force). The effect of the resistance force on oscillating body is to ensure, which somewhat slows down the entire process fluctuations, t. e. increases the time for one complete oscillation gradually decreases and the magnitude of the oscillation. Oscillations of a material point, that occur under the action of forces of environmental resistance and restoring force, are called free vibrations.

Free oscillations of a body the less differ from his own hesitation, the smaller the resistance force of the environment, in which there are these fluctuations. Thus, natural oscillations can be considered as a limit case of free oscillations with unlimited power reduction resistance.

Let's consider another type of oscillation. When on the floor is a continuously operating machine, for example, the motor, the floor ranges. When the engine is on the boat, on the plane of the housing also vary. These oscillations are caused by repetitive external impact. Vibrations of a body, created periodically acting on the body by an external force, called forced oscillations. In this case, the oscillating body in addition to periodically changing external force is still the drag force and the restoring force.

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