一、设计背景高中物理力学部分中“运动的合成与分解”的内容一直是教学中的难点。为了突破这个难点,教学中需要借助一些教学仪器,虽然教科书上安排了试管蜡块实验,但仍然有不少学生不能理解这部分内 First, the design background High school physics and mechanics in the part of the “synthesis and decomposition of movement,” the content has been the teaching of the difficulties. In order to break through this difficulty, some teaching instruments are needed in teaching. Although test tubes and wax blocks are arranged in textbooks, many students still can not understand this part