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MHT CET202211 Aug 2022Morning ShiftPhysicsRotational MotionActual

A ring, a solid sphere and a disc have same mass and radius. Which of them have the largest moment of inertia?

Options

  1. AAll have the same moment of inertia
  2. BSolid sphere only
  3. CRing only
  4. DDisc only

Correct answer

C. Ring only

Step-by-step solution

Formula for moment of inertia are listed below: I_ Ring =M R^2I_ Sphere = 2 5 M R^2I_ Disc = 1 2 M R^2 Ring has largest moment of inertia as the mass is distributed far away from the axis of rotation. Above formulas just confirm that.

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