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When no external force acts on a body after giving it initial displacement, the vibration of the body under this conditions is also known as:

When no external force acts on a body after giving it initial displacement, the vibration of the body under this conditions is also known as: Correct Answer Free vibration

Vibration: A body is said to be vibrating if it has a to and fro motion.

Various types of vibrations are mentioned in the table below.

Type of vibrations

Explanation

Free (natural) vibrations

Elastic vibrations in which there are no friction and external forces after the initial release of the body.

Damped vibrations

When the energy of the vibrating system is gradually dissipating (transient) by friction and other resistances, the vibrations are said to be damped.

The vibrations gradually cease and the system rests in its equilibrium position.

Forced vibrations

When a repeated force continuously acts on a system, the vibrations are said to be forced.

The frequency of vibrations is that of the applied force and is independent of their own natural frequency of vibrations.

Longitudinal vibrations

If the shaft is elongated and shortened so that the same moves up and down resulting in tensile and compressive stresses in the shaft, the vibrations are said to be longitudinal.

The different particles of the body move parallel to the axis of the body.

Transverse vibrations

When the shaft is bent alternately and tensile and compressive stresses are induced, the resulting vibrations are said to be transverse.

The particles of the body move approximately perpendicular to its axis.

Torsional vibrations

When the shaft is twisted and untwisted alternately and torsional shear stresses are induced, the resulting vibrations are known as torsional vibrations.

The particle of the body moves in a circle about the axis of the shaft.

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