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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

the rate of change of angular velocity
(astronautics) the acceleration of a space vehicle around an axis
angular acceleration
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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