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运用牛顿第二定律解决具体实际问题时,同学们常常对于复杂问题无从下手,而这一内容又是高考的必考内容,因此,这种从复杂的对象中隔离出某一孤立的物体进行研究的方法,在本章中便显得十分重要.在牛顿定律知识应用的过程中,初学者常犯的错误主要表现在:对物体受力情况不能进行正确的分析,其原因通常出现在对弹力和摩擦力的分析与计算方面,特别是对摩擦力(尤其是对静摩擦力)的分析;对运动和力的关系不能准确地把握,如在运用牛顿第二定律和运动学公式解决
The use of Newton’s second law to solve practical problems, the students often can not start for complex issues, and this content is the college entrance examination content, therefore, from the complex object isolation of an isolated object to study In this chapter is very important.In the application of Newton’s law of knowledge, beginners often make mistakes: the object can not be the right analysis of the situation, the reason usually occurs in the elastic and friction Analysis and calculation of forces, especially the analysis of friction (especially static friction); the relationship between movement and force can not be accurately grasped, as in the use of Newton’s second law and kinematic equations to solve