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文献1中分别用了运动的合成与分解、相对运动及办跟巧、巧的其他关系这三种方法求解两直杆交点问题。笔者认为,这三种方法均没有直接构建数学模型求解自然、通用,而且后者运用的物理知识更少,对学生来说理解运动的本质更深,更能培养学生的思维能力。下面给出文献中两道题的详细解法。t题目如图1所示,两直杆a6、cd夹角为交点为p,两杆各以垂直自身的速度巧、巧在纸面内运动,则交点p运动速度的大小是多少[1]?
Literature 1, respectively, with the synthesis and decomposition of the movement, the relative movement and follow the clever, clever other relationships these three methods to solve the problem of intersection of two straight rods. The author believes that these three methods are not directly to build a mathematical model to solve natural, common, and the latter to use less physical knowledge, to understand the nature of the movement for students deeper, more able to train students’ thinking ability. The following gives a detailed explanation of two problems in the literature. t title as shown in Figure 1, the two poles a6, cd angle for the intersection of p, two with their own vertical speed clever, clever in the paper movement, the intersection point p is the size of the speed of movement [1 ]?