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What is angular acceleration alpha?
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Angular acceleration is the rate of
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change of angular velocity with respect
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to time. Angular acceleration describes
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how quickly the angular velocity of a
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rotating object changes.
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This change can be due to an increase or
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decrease in the speed of rotation or a
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change in direction. Angular
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acceleration is a vector quantity,
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meaning it has both magnitude and
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Its direction depends on how the angular
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velocity is changing. The SI unit of
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angular acceleration is radians per
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second squared rad s squared. Imagine a
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ceiling fan starting from rest and
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gradually spinning faster. Height of a
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>> rate of rotation over time is angular
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If it slows down, it experiences
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negative angular acceleration. Examples:
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a fan speeding up after being switched
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on, a rotating wheel slowing down due to
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friction, a disk increasing its rate of
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rotation, Earth's rotation changing very
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slightly over time, machinery parts
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changing rotational speed.
