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Q.

The moment of inertia of a cube of mass m and side a about one of its edges is equal to

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a

83ma2

b

23ma2

c

3ma2

d

43ma2

answer is A.

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Detailed Solution

From theorem of perpendicular axes, we have

I=IC+ma22=ma212+ma212+ma22=23ma2

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The moment of inertia of a cube of mass m and side a about one of its edges is equal to