论文部分内容阅读
高中物理题中有一些题目的题型差不多,解题思路、方法相似.如果能找到一类题目的规律,建立模型,那么在解答这一类的物理问题就非常的方便、准确、简单了.本文将介绍力学中的两类三倍模型.第一类:直线运动题的三倍模型例1在光滑水平面上有一静止的物体.现以水平恒力甲推这一物体,作用一段时间后,换成相反方向的水平恒力乙推这一物体,当恒力乙作用时间与恒力甲作用时间相同时,物体恰好回到原处,此时物体的动能为32 J,则在整个过程中,恒力
There are some topics in high school physics questions about the same type, problem-solving ideas, methods are similar.If we can find a law of topics, model building, then the solution to this type of physical problems is very convenient, accurate and simple. This article will introduce two types of mechanical models of three times the first class: three times the model of linear motion Example 1 in a smooth horizontal plane has a stationary object is now a horizontal constant force A push this object, after a period of time, Change to the opposite direction of the horizontal constant force B push this object, when the constant force B role and constant force acting on the same time, the object happens to be back exactly where the object kinetic energy of 32 J, the entire process Constant force