State and explain the principle of conservation of angular momentum?
Question: State and explain the principle of conservation of angular momentum?
The principle of conservation of angular momentum states that, if no external torque acts on a system, the total angular momentum of the system remains constant. This means that the product of the moment of inertia and the angular velocity of a rotating body is always the same, unless an external force changes it. For example, a spinning ice skater can change her angular momentum by pulling her arms closer to her body, which reduces her moment of inertia and increases her angular velocity. Angular momentum is a vector quantity, so it has both magnitude and direction. The direction of angular momentum is perpendicular to the plane of rotation, and follows the right-hand rule. Angular momentum is important for understanding many phenomena in physics, such as planetary orbits, gyroscopes, and black holes.
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