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NEET 2005
Exam
NEET
Year
2005
Subject
Physics
Chapter
Rotational Motion

NEET 2005 · Physics · Rotational Motion

The moment of inertia of a uniform circular disc of radius R and...

The moment of inertia of a uniform circular disc of radius RR and mass MM about an axis passing from the edge of the disc and normal to the disc is:

Options

  1. AMR2M R^2
  2. B12MR2\frac{1}{2} M R^2
  3. C32MR2\frac{3}{2} M R^2
  4. D72MR2\frac{7}{2} M R^2

Correct answer

C. 32MR2\frac{3}{2} M R^2

Step-by-step solution

M.I. of disc about its normal =12MR2=\frac{1}{2} M R^2 M.I. about its one edge =MR2+MR22=M R^2+ \frac{M R^2}{2} \therefore \quad  M.I. =32\text{ M.I. }= \frac{3}{2} M R^2
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