洛阳师范学院学报
洛暘師範學院學報
락양사범학원학보
JOURNAL OF LUOYANG TEACHERS' COLLEGE
2014年
8期
50-53
,共4页
机械能定理%机械能守恒定律%内势能%外势能
機械能定理%機械能守恆定律%內勢能%外勢能
궤계능정리%궤계능수항정률%내세능%외세능
the theorem of mechanical energy%the law of conservation of mechanical energy%internal poten-tial energy%external potential energy
阐述了引入外势能质点系的“功能原理”和机械能守恒定律在一般情况下不成立，而且有悖常识，没有存在的必要；并进一步指出质点系的“功能原理”应改为质点系的机械能定理，质点系的机械能守恒定律是力学中的能量转化与守恒定律，是力学中一条独立定律，而不是“功能原理”的推论。
闡述瞭引入外勢能質點繫的“功能原理”和機械能守恆定律在一般情況下不成立，而且有悖常識，沒有存在的必要；併進一步指齣質點繫的“功能原理”應改為質點繫的機械能定理，質點繫的機械能守恆定律是力學中的能量轉化與守恆定律，是力學中一條獨立定律，而不是“功能原理”的推論。
천술료인입외세능질점계적“공능원리”화궤계능수항정률재일반정황하불성립，이차유패상식，몰유존재적필요；병진일보지출질점계적“공능원리”응개위질점계적궤계능정리，질점계적궤계능수항정률시역학중적능량전화여수항정률，시역학중일조독립정률，이불시“공능원리”적추론。
It is demonstrated that the work-energy principle and the law of conservation of mechanical energy with external potential energy are not necessary because they are not true in general cases and contrary to common sense .It is pointed out that the work-energy principle should be replaced by the theorem of mechanical energy , and that the law of conservation of mechanical energy is the form of the law of conservation and conversion of energy in the mechanics , it is also an independent law of mechanics rather than a inference of the work-energy principle .
