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一、力的作用的相互性力的作用是相互的。也就是说,甲给乙一个力的作用,乙同时也给甲一个力的作用。因此,此时甲是施力物体,同时也是受力物体;而乙是受力物体,同时乙也是施力物体。不过有一点要弄清楚,说甲是施力物体,是对于甲施加给乙的这个力而言的;说甲是受力物体,是对于乙反过来施加给甲的这个力而言的。同样,说乙是受力物体,是对于甲施加给乙的这个力而言的;说乙是施力物体,则是对于乙施加给甲的这个力
First, the role of mutual influence The role of force is mutual. In other words, A gives B a force, B also gives A force. Therefore, at this time A is the force object, but also the force object; and B is the force object, while B is the force object. One thing to be clear, however, is that armor is an object of exertion, which is for a force exerted on armor B by a armor; that armor is a force-bearing object, in terms of the force which armor A exerts on armor. Similarly, saying that B is a stressed object is a force applied by B to B; B is a forced object, and this force is applied by B to B