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dong neng bian , dong liang yi ding bian ma
Author(s): 
Pages: 94-95
Year: Issue:  4
Journal: Physics Bulletin

Abstract:  动量和动能是高中物理学中的两个重要概念.在辨析动量和动能两个概念的异同,尤其是突出强调动量是一个矢量,要考虑方向这个问题上,有这样一种说法被一些教师和各种参考书广泛引用,即物体的动能改变,其动量一定改变.真的是这样吗?下面我们来做具体分析.
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