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在运动的合成与分解中,速度的分解对学生来讲又抽象又难理解,特别是和力的分解容易混淆,下面通过一个例题呈现当中出现的问题。矢量的分解都遵从同样的法则——平行四边形定则。满足平行四边形定则的任意分解方式对于学生会出现什么问题呢?我们来看下面的例子。
In the synthesis and decomposition of the movement, the decomposition of the speed is abstract and hard to understand to the students. In particular, it is easily confused with the decomposition of the force. The following problems are presented through an example. The decomposition of the vector follows the same rule - the parallelogram principle. What can we do if students meet any discretization that satisfies the principle of parallelograms? Let’s look at the example below.