Question Detail
Question
Determine the moment of inertia of a solid sphere 4 m in diameter and of mass 8 kg about an axis through its centre.
Correct Answer
Option D is the correct answer.
Detailed Explanation
Radius r = 2 m. For solid sphere, I = (2/5)MR² = (2/5) × 8 × (2)² = (2/5) × 8 × 4 = (2/5) × 32 = 64/5 = 12.8 kg·m².
Hint
I_solid sphere = (2/5)MR².