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压力、支持力是一对作用力和反作用力,它们都属于弹力.尽管对它们比较熟悉,但在解决实际问题时,仍会出现错误,这常常是由于“思维定势”所致,为克服这种“思维定势”,本文要从“压力是否由重力引起的?”和“外面上的物体对斜面的压力都是mgcosθ吗?”两个方面谈谈自己的认识.
Stress and support are a pair of forces and reaction forces. They all belong to the elastic force. Although they are more familiar with it, they still make mistakes in solving practical problems. This is often caused by “thinking and fixing” and overcoming. This kind of “thinking fixed potential”, this article from the “whether the pressure caused by gravity?” And “the object on the outside of the pressure on the slope are mgcosθ it?” Two aspects to talk about their own understanding.