moment of inertia: uniform annulus consists of disc of radius 3 meters with a disc of

[markosheehan]

a uniform annulus consists of disc of radius 3 meters with a disc of radius 1 meters removed from its center. the mass of the annulus is m. Prove that the moment of inertia of the annulus about an axis through its center is 5m.

also does anyone know any good links for explaining basics of moments of inertia​

 

[Deleted member 4993]

a uniform annulus consists of disc of radius 3 meters with a disc of radius 1 meters removed from its center. the mass of the annulus is m. Prove that the moment of inertia of the annulus about an axis through its center is 5m.

also does anyone know any good links for explaining basics of moments of inertia​

First calculate the areal density of the annulus from the given mass and the radii. Then perform the double integration. You can solve it without integration also (by knowing the MI of a solid (without hole) disk.