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NEET UG PHYSICS MCQ: SYSTEM OF PARTICLES

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A horizontal platform is rotating with uniform angular velocity around the vertical axis passing through its centre. At some instant of time a viscous fluid of mass ‘m’ is dropped at the centre and is allowed to spread out and finally fall. The angular velocity during this period

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Correct option: B

Decreases initially and increases again

Option B (Decreases initially and increases again) is correct because the moment of inertia increases initially as the fluid spreads, then decreases as the fluid falls off, affecting the angular velocity.

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