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Physics Rotational Motion Conservation of Energy Single Correct MCQ
Published on: September 12, 2026

A wheel is rotating freely with an angular speed on a shaft. The moment of inertia of the wheel is 1 and the moment of inertia of the shaft is negligible. Another wheel of moment of inertia initially at rest is suddenly coupled to the same shaft. The resultant fractional loss in the kinetic energy of the system is

A
B

C
0
D

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The correct answer is:
D

JEE Main 2020

Fractional loss

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