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物体的二力平衡问题是初中的重难点,涉及力的定义、受力分析、力的矢量运算、求解方程等.下面对初中物理二力平衡问题的求解方法进行总结.1.二力平衡的定义.研究对象受到两个力的同时作用而处于平衡状态时,则这两个力大小一定相等,方向相反,且作用在同一直线上,其合力一定为零.那么,这两个力叫作一对平衡力.2.二力平衡的条件.(1)两个力大小相等,方向相反.(2)二力作用在同一个物体上.(3)两个力在同一条直线上.
The problem of the balance of the two forces of the object is the heavy and difficult point of the junior high school, the definition of the involved forces, the force analysis, the vector operation of the force, the solving equation, etc. The following summarizes the solving methods of the problem of the balance of the physical force of the junior middle school.1. The object of study is balanced by the simultaneous action of the two forces, the two forces must be equal in magnitude and opposite in direction, and act on the same line, and their combined force must be zero. (2) The two forces acting on the same object (3) The two forces in the same straight line. (2) The two forces in the same object.