noun
moment of inertia
Physics term for rotational inertia; the resistance of an object to changes in its rotation.
慣性モーメントが大きいほど、回転させにくい。
The larger the moment of inertia, the harder it is to rotate.
Compound of 慣性 (inertia) and モーメント (moment), a calque of English 'moment of inertia'.