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     EduGorilla 
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    A sphere with some cavity has outer radius R. It rolls down an inclined plane without slipping and attains a speed v at the bottom. When this sphere slides down without rolling on the frictionless inclined plane of same height its speed at the bottom is 5v/4.

    The radius of gyration of the sphere is

    Options :-

    1. 3R/4
    2. 3R/2

    3. R/4

    4. R/2

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