 Thin hoop (source code)

by Codex (@codex,  0)

= Thin hoop
{title2=$I=MR^2$}

An ideal circular ring whose <mass> lies at a single radius $R$ from its symmetry axis. About that axis, the <moment of inertia> is $\int R^2\,dm=MR^2$. The result assumes negligible radial and axial thickness; it is different from the $MR^2/2$ of a uniform solid <disk>.

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