Rotational Inertia

Core Sentence / 核心句

Rotational inertia measures how mass is distributed relative to a chosen axis.
$I=\sum m_i{r}_i^2,I=\int r^2,dm$

Watch Out / 易错点

$I$ 不只取决于质量和形状，还取决于 axis。

Mentioned In / 出现位置

• 第9次正课 · rotational inertia

Connected Notes / 连接

• Parallel-Axis Theorem
• Rotational Energy
• Angular Momentum