Two identical spherical balls of mass M and radius R each are stuck on two ends of a rod of length 2R and mass M (see figure). The moment of inertia of the system about the axis passing perpendicularly through the centre of the rod is:
A
15215MR2
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B
1715MR2
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C
13715MR2
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D
20915MR2
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Solution
The correct option is A13715MR2 For Ball using parallel axis theorem.