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System of Particles and Rotational Motion

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System of Particles and Rotational Motion
  1. The ratio of radii of gyration of a circular ring and a circular disc, of the same mass and radius, about an axis passing through their centres and perpendicular to their planes are
    1. √2 : 1
    2. 1 : √2
    3. 3 : 2
    4. 2 : 1
Correct Option: A

I = MK²
∴ K = √I/M
Iring = MR² and Idisc = (1/2)MR²



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