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A uniform disc of mass 4 kg and radius 0.2 m turns about its central axis normal to its face. Find its moment of inertia.
A0.16 kg m^2
B0.32 kg m^2
C0.08 kg m^2
D0.04 kg m^2
Answer & Solution
Correct answer: C. 0.08 kg m^2
A disc about its perpendicular central axis has I = MR^2/2 = 4 x 0.04 / 2 = 0.08 kg m^2.
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