JEE Advanced 2011 Physics question
Four solid spheres each of diameter cm and mass 0.5 kg are placed with their centers at the corners of a square of side 4 cm. The moment of inertia of the system about the diagonal of the square is kg-m², then N is
Answer: 9
Solution
Radius of each sphere cm, so . Two spheres have their centres on the chosen diagonal: each contributes . The other two spheres have their centres at a distance
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