笔者在中考前复习初二《物理》教材“摩擦力”之后,接着上了这样一堂习题课,效果很好,现介绍如下,以便与各位同仁共同探讨。题1木块重10N,在2N水平拉力作用下,恰好能沿水平桌面做匀速直线运动,若此木块在3N的水平拉力下,沿水平桌面前进了0.1m,则()A.木块受到摩擦力为3N。B.木块 After reviewing the “Friction” of the “Physics” textbook in the second grade in the middle of the exam, the author went on with such an exercise class. The results were very good. The presentation is as follows to discuss with colleagues. Question 1 wood block weight 10N, in the 2N horizontal tension, just along the horizontal table to do uniform linear motion, if the wooden block in the 3N horizontal tension, along the horizontal table advance 0.1m, then () A. wooden block The friction force is 3N. B. Wooden block