Question Detail
Question
Calculate the moment of inertia of a solid cylinder of mass 10kg and diameter 4m about an axis through the centre.
Correct Answer
Option D is the correct answer.
Detailed Explanation
For solid cylinder about central axis, I = ½ MR². Radius = diameter/2 = 2 m. So I = ½ × 10 × 2² = ½ × 10 × 4 = 20 kgm².
Hint
I = ½ MR² for solid cylinder. Use radius, not diameter.