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中文摘要：
物理学的不同分支学科之间实际上存在着某些相似甚至相同的特征,因而可以进行类比.本文讨论力学和电学之间的类比.为此,首先以动量这一广延量作为力学的中心量,进而引入动量流的概念.文中在电荷量与动量、电流与动量流、电势差与速度差、电阻与动量阻、电容与动量容等各个相对应的物理量之间,以及相对应的计算关系式之间进行了类比,从而凸显出力学和电学的相似性或可比性以及宇宙事物的内在联系.不同分支学科之间的类比不仅可以拓宽师生的视野和思路,有利于物理教学,而且能提升人们对于力学,乃至整个物理学的认识水平。
英文摘要：
There exist some similar or even identical characteristics between the different bran- ches of physics, which make the analogy between them possible. The analogy between mechanics and electricity is briefly discussed in this paper. Therefore, the concept of momentum current is introduced after the extensive quantity momentum has been taken as the central quantity in mechanics. Then, the analogies between such corresponding quantities in these two branches as electric charge and momentum, electric current and momentum current, po- tential difference and velocity difference, electric resistance and momentum resistance, electric capacity and momentum capacity, and the corresponding calculation formulas （relationships between the quantities） are simply conducted in the paper. As a result, the similarity or com- parability between mechanics and electricity, and the internal connection of cosmic matters are highlighted. It is therefore anticipated that such analogies should not only be conducive to o- pening up new horizons for both teachers and students, activating their innovative ideas and hence promoting the teaching of physics, but also be beneficial for improving people＇s cogni- tive level of mechanics and even whole physics itself.
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