摘要
重力是一个非常重要的物理概念，围绕重力概念存在分歧．力是牛顿时代建立的抽象概念，重力是体现万有引力作用效果的一种效果力，这种抽象的虚拟力概念不利于学生掌握．力也可以看成是动量流强度，文献[11]从动量流视觉定义了重力，这是应该肯定的．但该定义也存在一些问题，对此进行辨析，并用动量流概念重新定义重力，通过对相关问题的解释说明重力新定义的合理性和有效性．
Weight is a very important physical concept. There are differences around the concept of weight Force is the abstract concept of the Newton era. The weight is a kind of effect force that reflects the effect of gravity, which is not conducive to students to master the concept of virtual force. Force can also be considered as the momentum current intensity. The literature Vll] gives a definition of weight from the momentum current perspective. This definition has some problems, which are questioned, and the weight is redefined using the concept of momentum current. The reasonableness and validity of the new definition of weight is explained through the interpretation of the relevant experiments.
出处
《物理通报》
2016年第1期117-121,共5页
Physics Bulletin
基金
福建省教育厅重点课题“三位一体”模式下的“卓师教育”培养研究,课题编号:JAS151293
关键词
重力
动量流
超重
失重
weight
momentum current
overweight
weightlessness
