机械能守恒,机械能守恒,jixieneng shouheng,机械能,守恒,shouheng,jixieneng,[拼音]:jixieneng shouheng[外文]:conservation of mechanical energy质点或质点系在势力场(见保守系统)中运动时,其动能和势能之和保持为常量。动能和势能之和称为机械能,故称机...