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MHT CET202311 May 2023Morning ShiftPhysicsRotational MotionActual

Radius of gyration of a thin uniform circular disc about the axis passing through its centre and perpendicular to its plane is K _ c . Radius of gyration of the same disc about a diameter of the disc is K_d . The ratio K_c: K_d is

Options

  1. A2 : 1
  2. B1: 2
  3. C2: 1
  4. D1: 4

Correct answer

A. 2 : 1

Step-by-step solution

Let the radius of the disc be R array ll & K _ c = R 2 & K _ d = R 2 array Taking the ratio, K _ c K _ d = R 2 R 2 = 2 1

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