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高—物理“摩擦力”这节内容的教学难点是摩擦力方向的判断,教材中的判断方法是利用“滑动摩擦力方向跟物体的相对运动方向相反”,“静摩擦力方向跟物体的相对运动趋势的方向相反”这一规律.但在实际教学中发现基础一般的学生很难真正掌握这种方法.本刊2005年第11期《用摩擦力?
The difficulty in the teaching of high-physical “friction” in this section is the judgment of the direction of friction. The judgment method in the textbook is to use “the direction of sliding friction is opposite to the direction of the relative motion of the object” and “the relative movement of the static friction direction and the object. ”The trend is in the opposite direction“. However, it is very difficult for students who found basic students in actual teaching to really grasp this method. Journal of the 11th issue of 2005, ”With friction?