# Angular acceleration

the time rate of change of angular velocity of a rotating body.

Historical *Examples*

To find the angular acceleration A, draw kt, bt respectively parallel to and at right angles to the link KB.

Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 8 Various

Similarly, if a body is rotated round a vertical axis, we perceive only angular acceleration and not angular velocity.

Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 Various

**noun**

the rate of change of angular velocity

(astronautics) the acceleration of a space vehicle around an axis

angular acceleration

(āng’gyə-lər)

The rate of change of angular velocity with respect to time. Angular acceleration is measured in revolutions per minute squared or in radians per second squared.

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