alleryA solid sphere of mass M and radius R has moment of inertia about a diameter:
A(1/2) M R²
B(2/5) M R²
C(2/3) M R²
DM R²
Answer & Solution
Correct answer: B. (2/5) M R²
1. For a uniform solid sphere about a diameter, I = (2/5) M R².
2. Compare: solid disc / diameter = (1/4) MR²; solid cylinder / axis = (1/2) MR².
3. Hollow (thin) spherical shell about a diameter = (2/3) M R² — easy to confuse.
_Source: syllabus Physics Ch 6 §6.9 Table of moments of inertia_
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