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The radius of gyration about the polar axis of a circular lamina of radius 0.2 m is:

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  1. 4.1 cm
  2. 0.14 m
  3. 0.1 m
  4. π cm

Answer (Detailed Solution Below)

Option 2 : 0.14 m
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Detailed Solution

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Concept:

The radius of gyration about the polar axis is given by:

For a circular lamina:

  • Polar moment of inertia,
  • Area,

Calculation:

 

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