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NEET UG PHYSICS MCQ: SYSTEM OF PARTICLES

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A ring of radius 1 m and mass 20 kg is rotating about is diameter with angular velocity of 40 rad/sec. Its kinetic energy is

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Correct option: C

8000 J

Option C (8000 J) is correct because the kinetic energy of a rotating ring is given by

KE = \frac{1}{2}I\omega^2

, where I is the moment of inertia about the diameter and

\omega

is the angular velocity.

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