摩擦力的题目是初中物理中的难点,尤其是当和二力平衡的有关知识结合后,学生往往会由于题目中呈现条件的不同而出现错误的解答,解决摩擦力问题的关键在于认清摩擦力的种类。静摩擦力应用二力平衡的知识,滑动摩擦力应判断影响因素是否发生改变,从而解决问题。一、你变我变例1用50N的推力推水平放置的木箱,未推 The problem of friction is the difficulty of junior high school physics, especially when combined with the relevant knowledge of the balance of two forces, students often have the wrong answer due to the different conditions presented in the title. The key to solve the friction problem lies in recognizing the friction Kind of force Static friction Applying the balance of two knowledge, sliding friction should determine whether the impact of changes in the factors that solve the problem. First, you change me Variant 1 Push the wooden box with 50N thrust push level, did not push