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JEE PYQ: Rotational Motion Question 40

Question 40 - 2020 (09 Jan Shift 1)

Three solid spheres each of mass $m$ and diameter $d$ are stuck together such that the lines connecting the centres form an equilateral triangle of side of length $d$. The ratio $\frac{I_O}{I_A}$ of moment of inertia $I_O$ of the system about an axis passing the centroid and about center of any of the spheres $I_A$ and perpendicular to the plane of the triangle is:

Three spheres forming equilateral triangle, with centroid O marked

(1) $\frac{13}{23}$

(2) $\frac{15}{13}$

(3) $\frac{23}{13}$

(4) $\frac{13}{15}$

Show Answer

Answer: (1)


Learning Progress: Step 40 of 70 in this series