物体转动时，构件中各质点或质量单元的质量和它到给定轴线的距离平方乘积的总和moment of inertia

• 麦利特将大型火车头的底盘分成两段，从而减小拐弯时的转动惯量。

  Tianjin Mailite Co., Ltd. have divided large locomotive chassis into two, thereby reducing the moment of inertia when cornering.

• 腕表的振频可通过更改摆轮的转动惯量以作调整。

  The vibration frequency of the watch can be adjusted by changing the moment of inertia of the balance wheel.