Glossary · term

Moment of inertia

Mechanics

Domain
Mechanics

Definition

The rotational counterpart of mass — how hard a body is to spin up — set by how far from the axis its mass sits, squared. A flywheel puts its mass at the rim for exactly this reason.

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From the Glossary database in Notion, last edited 2026-08-18. This page is the row, rendered by the build; nothing on it is written by hand.