Question

Define angular acceleration.

Answer 1

$\huge\bf{Hello!!}$

$<b>Angular acceleration, also called rotational acceleration, is a quantitative expression of the change in angular velocity that a spinning object undergoes per unit time. It is a vector quantity, consisting of a magnitude component and either of two defined directions or senses.</b>$

Answer 2

$angular \: acceleration$

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The rate of change of angular velocity or change in angular velocity per unit time is known as angular acceleration.

$unit \: \frac{rad}{s 2}$