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高考对于天体运动问题的考查不断变换角度,而且与当代的科学成果相结合,题目灵活,是每年高考命题的重点。学生碰到天体问题往往无从下手,乱套公式,导致解题错误。为了更快更准地解决天体问题,笔者总结了一些有效的方法。一、天体的三角关系所有的圆周运动而言,都有如下方法解决:方程:F_(径向合力)=F_(向)选择原则:①已知谁,选谁;②求谁,选谁。二、圆周运动中“供”“需”关系如何正确形象地理解“供”“需”关系呢?笔者作如下比喻:
College entrance examination for the movement of celestial bodies constantly changing point of view, but also with the contemporary combination of scientific achievements, the topic flexible, is the focus of the annual college entrance examination proposition. Students often encounter celestial body problems can not start, mess formula, leading to problem-solving errors. In order to solve the problem of celestial bodies faster and more accurately, the author summarizes some effective methods. First, the celestial triangular relationship All circular motion, are as follows: Equation: F_ (radial force) = F_ (direction) selection principles: ① who knows who; who to whom; Second, the circular movement “for ” “need ” relationship how to correctly understand the image “for ” “need ” relationship? I make the following metaphor: