Physics · Rotational Motion
Seven uniform disks, each of mass M and radius R, are inscribed inside a regular hexagon as shown. The mass per unit area of each disc is σ = cr, where r is the distance from the center of the disk. The moment of inertia of this system of seven disks, about an axis passing through the center of the central disk and perpendicular to the plane of the disks, is:
- 1515 MR2
- 21385 MR2
- 31415 MR2✓
- 4552 MR2
Correct answer
1415 MR2
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