机械能守恒的条件及其协变性

Discussion on mechanical energy conservation from a mechanical test question

从一道力学试题出发,讨论了机械能守恒的条件,并深入研究了守恒规律的协变性要求.

Conditions of mechanical energy conservation were discussed from a mechanical test question. Some mistaken viewpoints were clarified, and requirements on covariability of conservation law were studied deeply.