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Composition Setup

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hiddentrue

System: Any. — Interactions: Any. — Note: This difficult model is only used for gyroscopes.

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Angular Momentum and External Torque

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iddesc
Description and Assumptions

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This model is generally applicable, but mathematically very complicated. In introductory mechanics it will only be used to describe the motion of a gyroscope.

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idcues
Problem Cues

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Only used in problems involving a gyroscope.

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idpri
Prior Models

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Vocabulary

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Model

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idsys
Compatible Systems

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Technically, any number of rigid bodies. In practice, only used in analyzing gyroscopes (single rigid body with a fixed pivot point).

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Relevant Interactions

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Only external torques need be considered. Internal torques do not change the system's angular momentum.

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Relevant Definitions

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idlaw
Law of Change

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Diagrammatic Representations

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  • A delta-L diagram analogous to the of .

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Relevant Examples

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Photos courtesy:
Wikimedia Commons by user Kiko2000
NASA

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