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力学和电学从来就不是孤立的,力学和电学类高考题一般变化情况复杂,综合性强,多把场的性质、运动学规律、功能关系等知识有机地结合在一起,对考生的空间想像能力、物理过程和运动规律的综合分析能力,以及用数学方法解决物理问题的能力要求较高.研究电学时我们也要利用动力学观点来学习,这样才能从根本上理解它,下面举例说明.例1(2013年四川)在如图6所示的竖直平面内,物体A和带正电的物体B用跨过定滑轮的绝缘轻绳连接,分别静止于
Mechanics and electricity have never been isolated, mechanical and electrical changes in the general high school entrance examination questions are complex, comprehensive, and more field nature, kinematic laws, functional relationships and other knowledge organically together, the candidates of the space imagination , The comprehensive analysis ability of the physical process and the law of motion, and the ability to solve the physical problem mathematically.We also need to use the kinetic point of view when studying the electrical, so that we can understand it fundamentally and illustrate the following. 1 (Sichuan, 2013) In the vertical plane shown in Figure 6, object A and positively charged object B are connected by an insulated light rope across the fixed pulley, resting at