Q. The moment of inertia of a uniform circular disc of radius R and mass M about an axis passing from the edge of the disc and normal to the disc is :
A) (5/2)MR²
B) MR²
C) (7/2)MR²
D) (3/2)MR²
Explanation
[Solution from source] About the central perpendicular axis I = MR²/2. By the parallel-axis theorem, about a parallel axis through the edge I = MR²/2 + MR² = (3/2)MR². (5/2)MR² wrongly adds 2MR². Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.