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NEET2022PhysicsRotational MotionActual

The ratio of the radius of gyration of a thin uniform disc about an axis passing through its centre and normal to its plane to the radius of gyration of the disc about its diameter is

Options

  1. A2 : 1
  2. B4 : 1
  3. C1 : 2
  4. D2 : 1

Correct answer

A. 2 : 1

Step-by-step solution

For a thin uniform disc. Radius of gyration Case 1: K 1 = R 2 Case 2: K 2 = R 2 Q ⇒ K 1 K 2 = ? ∴ K 1 K 2 = R 2 R 2 = 2

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