画出使杠杆AB在图示位置静止时所用最小力F的作用点和方向(O为支点,OAOB)。解析这是我市初三调研考试的一道杠杆平衡作图题,该题能很好地考查学生的发散思维和开拓精神。从阅卷情况来看,答对率不超过5%,多数同学受定向思维的影响,认为动力作用点在A点,为保持杠杆平衡,要求作用 Draw the point of action and direction of the minimum force F used to bring lever AB to rest in the position shown (O is the fulcrum, OAOB). Analysis This is a lever balance drawing question in the third survey of the city. This question can well examine students’ divergent thinking and pioneering spirit. According to the reading situation, the correct answer rate is not more than 5%. Most students are affected by directional thinking and think that the power point is at point A. In order to maintain the balance of leverage, it is required to