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Questions  

Figure shows a uniform solid block of mass M and edge lengths a, b and c. Its M.I. about an axis through one edge and  perpendicular (as shown) to the large face of the block is

a
M3a2+b2
b
M4a2+b2
c
7M12a2+b2
d
M12a2+b2

detailed solution

Correct option is A

(MI)CG=Ma2+b212According to the theorem of parallel axis,(MI)required axis =(MI)CG+M(OA)2  =Ma2+b212+Ma2+b24=Ma2+b23

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