Let I1 and I2 be the moments of inertia...

Let `I_1 and I_2` be the moments of inertia of two bodies of identical geometrical shapek, the first made of aluminium and the second of iron.

`I_1ltI_B`

`I_1=I_2`

`I_1gtI_2`

`relation between I_1 and I_2 depends on the actual shapes of the bodies

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