Physics-
General
Easy

Question

For the same total mass which of the following will have the largest moment of inertia about an axis passing through its centre of mass and perpendicular to the plane of the body

  1. a disc of radius a
  2. a ring of radius a
  3. a square lamina of side 2a
  4. four rods forming a square of side 2a

The correct answer is: four rods forming a square of side 2a

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Statement I : If A = open square brackets table attributes columnalign left left left columnspacing 1em end attributes row cell a      0      0 end cell row cell 0      b      0 end cell row cell 0      0      c end cell end table close square brackets , then A–1 = open square brackets table attributes columnalign center center center columnspacing 1em end attributes row cell 1 over a end cell 0 0 row 0 cell 1 over b end cell 0 row 0 0 cell 1 over c end cell end table close square brackets
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