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Q.

A disc of mass M and radius R lies in the x-y plane with its centre at a distance a from the origin on the x-axis. Which of the following statements are correct?

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a

M.I of the disc abo x-axis is MR2/4

b

M.I of the disc about z-axis is MR22+a2

c

M.I. of the disc about y-axis is MR22+a2

d

All of the above

answer is A, C.

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Detailed Solution

Question Image

using perpendicular axis theorem, we can say

Ix-axis=MR24 

Iz-axis=MR22+Ma2

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