Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Rotating Stool

旋转椅
If the masses are pulled in, the moment of inertia is considerably decreased. Conservation of angular momentum dictates that the angular velocity must increase.
如果质量被拉向中心，转动惯量会显著减小。角动量守恒定律规定，角速度必须增加。
 The moment of inertia is large with the masses held out. For a given angular momentum, the angular velocity is relatively low.
转动惯量与质量分布越远越大。对于给定的角动量，角速度相对较低。
Experimenters: Yvette Gilbert, Michael O'Brien
实验者：Yvette Gilbert, Michael O'Brien
 Index

Vector rotation examples
索引矢量旋转示例
 
HyperPhysics***** Mechanics ***** Rotation
HyperPhysics ***** 力学 ***** 转动
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