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A uniformaly thick wheel with moment of ...

A uniformaly thick wheel with moment of inertia I and radius R is free to rotate about its centre of mass (see fig). A massless string is wrapped over its rim and two blocks of masses `m_(1)an d m_(2)(m_(1)gtm_(2))` are attached to the ends of the strung. The system is released from rest. The angular speed of the wheel when `m_(1)` descents by a distance h is :

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