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新高考的选拔愈来愈注重考查学生的能力和素质,其命题愈加明显地渗透着对物理思想、物理方法的考查。同时,物理习题浩如烟海,千变万化,不可能有一个统一的解答方法,但掌握一些基本的解题思想和方法,就如同要开启各式各样的“锁”时,找到了一把“万能的钥匙”。一、意想不到的方法——量纲法例1一个恒力作用在质量为m_1的物体上,产生的加速度为a_1,作用在质量为m_2的物体上,产生的加速度为a_2,若这个恒力作用在质量为m_1+m_2的
The selection of the new college entrance examination more and more emphasis on examining the ability and quality of students, the proposition more clearly permeated with physical thoughts, physical methods of examination. At the same time, there are so many physical exercises that they can not have a unified solution. However, mastering some basic ideas and methods for solving problems is similar to opening a wide range of “locks” and finding a “ Universal key ”. First, the unexpected method - Dimensional Law 1 A constant force acting on an object of mass m_1 produces an acceleration of a_1 acting on an object of mass m_2 resulting in an acceleration of a_2. If this constant force acts The mass is m_1 + m_2