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JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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A thin horizontal circular disc is rotating about a vertical axis passing through its centre. An insect is at rest at a point near the rim of the disc. The insect now moves along a diameter of the disc to reach its other end. During the journey of the insect, the angular speed of the disc

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Correct option: C

first increases and then decreases

The correct answer is C (first increases and then decreases) because the moment of inertia changes as the insect moves, affecting the angular speed due to conservation of angular momentum.

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