1错图分析在《高中物理人教版教材(必修1)》(以下简称为《必修1》)第四章第五节“牛顿第三定律”中,谈到“物体的受力分析”时,教材讨论了一个静止于斜面上的滑块,并给出了两幅受力分析图(见图1)[1].例如,一个物体静止在粗糙斜面上,我们按重力、弹力、摩擦力的顺序来分析它的受力情况(图1(a)).木块受到重力G,方向竖直向下;木块和斜面接触并相互挤压,木块受到垂直斜 1 Error Graph Analysis In the “High School Physics PEP Edition Materials (Required 1)” (hereinafter referred to as “Compulsory 1”) Chapter IV, Section IV “Newton’s Third Law”, talked about “object force Analysis ”, the textbook discusses a slider resting on a bevel and gives two stress analysis charts (see Figure 1). For example, when an object is stationary on a rough bevel and we gravitate, (Fig. 1 (a)). The block is subjected to gravity G and the direction is vertical downward. The block and the slope are in contact with each other and pressed against each other, and the block is vertically inclined