angular acceleration

American  

noun

Physics.

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

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angular acceleration British  

noun

1. the rate of change of angular velocity

2. astronautics the acceleration of a space vehicle around an axis

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angular acceleration Scientific  

/ ăng′gyə-lər /

1. 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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Etymology

Origin of angular acceleration

First recorded in 1880–85

Example Sentences

The kinematics of rotational motion describes the relationships among rotation angle, angular velocity, angular acceleration, and time.

From Textbooks • Aug. 12, 2015

When she hits the brake, the angular acceleration is large and negative.

From Textbooks • Aug. 12, 2015

In more technical terms, if the wheel's angular acceleration α is large for a long period of time t , then the final angular velocity ω and angle of rotation θ are large.

From Textbooks • Aug. 12, 2015

Tangential acceleration at is directly related to the angular acceleration α and is linked to an increase or decrease in the velocity, but not its direction.

From Textbooks • Aug. 12, 2015

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

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" by Various