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Manipal MET2014PhysicsRotational Motion

A circular disc of radius R 3 is cut from a circular disc of radius R and mass 9 M as shown. Then, moment of inertia of remaining disc about ' O ' perpendicular to the plane of the disc is

Options

  1. A4 M R^2
  2. B9 M R^2
  3. C37 9 M R^2
  4. D40 9 M R^2

Correct answer

A. 4 M R^2

Step-by-step solution

I₀= 9 M R^2 2 - [ M(R / 3)^2 2 +M ( 2 R 3 )^2 ]=4 M R^2

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