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BITSAT2024PhysicsRotational MotionActual

The moment of inertia of a cube of mass m and side a about one of its edges is equal to

Options

  1. A2 3 m a^2
  2. B4 3 m a^2
  3. C3 m a^2
  4. D8 3 m a^2

Correct answer

A. 2 3 m a^2

Step-by-step solution

From theorem of perpendicular axes, we have aligned I & =I_C+m ( a 2 )^2 & = [ m a^2 12 + m a^2 12 ]+ m a^2 2 & = 2 3 m a^2 aligned

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