Area moment of inertia for the quadrant shown is
- A. \pi r^4 / 2
- B. \pi r^4 / 4
- C. \pi r^4 / 8
- D. \pi r^4 / 16
Answer: D. \pi r^4 / 16
Explanation: For a full circle, I = \pi r^4 / 4. A quadrant is 1/4th. With respect to diametric axes, I = 1/4 * (\pi r^4 / 4) = \pi r^4 / 16.