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“摩擦力”是力学中的重点和难点,在一些复杂问题中,摩擦力有无的判断、类型的判别、方向的判定、大小的计算等等,都很能考查学生的思维能力,所以,摩擦力成了高考的必考内容.然而,在实际教学中,有关摩擦力的考题使学生感到无从下手,此时若能用数学函数图像把物理过程表达出来,再进行研究,不仅有助于学生对摩擦力的理解,还有利于培养学生用图像解决物理问题的能力.笔者就摩擦力函数图像的常见类型举例说明.
“Friction ” is the key and difficult point in mechanics. In some complicated problems, the judgment of whether there is friction, the type of judgment, the direction of judgment, the size of calculation, etc., are able to examine students’ thinking ability, Therefore, the friction has become the college entrance examination content.However, in the actual teaching, the friction test questions make students feel unable to start, then if the mathematical function of the image can be used to express the physical process, and then study, not only To help students understand the friction, but also help students develop the ability to use images to solve physical problems. The author gives an example of the common types of friction function images.