| 质心守恒问题的简便计算公式 |
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| 引用本文： | 于振深. 质心守恒问题的简便计算公式[J]. 天津工业大学学报, 1996, 0(1) |
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| 作者姓名： | 于振深 |
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| 作者单位： | 天津纺织工学院基础科学部 |
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| 摘 要： | 对质心守恒问题，提出采用相对坐标法来计算，即在质点系中选择一个主体（或载体），将一平动参考系固连在主体的质心上，求出质点系内其他物体（或质点）相对该平动参考系的位置，推导出以相对坐标表示的计算质心守恒问题的公式，以此可方便求得主体的移动量。
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| 关 键 词： | 质心守恒，主体，绝对坐标，相对坐标，平动参考系 |
Simple and convenient formulas calculating questions about conservation of a mass center |
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| Yu Zhenshen. Simple and convenient formulas calculating questions about conservation of a mass center[J]. Journal of Tianjin Polytechnic University, 1996, 0(1) |
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| Authors: | Yu Zhenshen |
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| Affiliation: | Div.of Basic Courses |
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| Abstract: | Calculating questions about conservation of a mass center with methods of relative coordinates has been advanced.The method is choosing a principal body in the system of particles,joining the origin of translating coordinate systems to the mass center of the body,calculating positions of other bodies with respect to the systems,deducing caiculating formulas.Thus moving quantity of the principal body is obtained conveniently. |
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| Keywords: | conservation of a mass center a principal body absolute coordinates relative coordinates translating coordinate systems |
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