文档介绍：初中物理滑轮教学设计
课题 11,2 滑轮 课时 两课时
初步认识定滑轮和动滑轮，了解这两种滑轮在生活和实际中的应用。
明确定滑轮和动滑轮的实质是变形杠杆。 教
学 知道定滑轮和动滑轮组合在一起使用可以组成滑轮组，达到既省力又目
标 能改变力的方向的目的。
通过本节的学习，初步了解透过现象看本质的思想方法。 教
学 重点:定滑轮和动滑轮的特点及它们的实质
重
难点:动滑轮的瞬时支点的确定方法 点
与
难 根据设计要求，连接滑轮组的绕绳方法 点
铁架台、滑轮两个、长细绳、钩码四个、 教
具 滑轮组,由两个滑轮组成的,两个
教 学 过 程 互动与反馈
第一课时:定滑轮和动滑轮的特点 一、初步认识滑轮 1(提出问题:如何把木料运到楼上,
做一做:选择合适的器材做一个模型，试一试能否实现自己的 设想。 2(介绍滑轮的结构:主要部分是能绕轴转动的轮子。
观察使用时的情景:;这种
滑轮称为定滑轮;
，这种滑轮称为动滑轮。 is an effective shortcut to scientific and technological innovation. To active exploration "research" joint innovation of path, through joint development, and technology cooperation, variety form, will University Hospital by of hi-tech results in I County for into, formed reality productivity; to relies on technology cooperation led economic structure upgrade, around I County industry layout, active docking University, and research hospital by, hi-tech research results, with external think tank, speed up transformation upgrade chemical, and mechanical, traditional industry, speed up life paper, and food, and textile, and mechanical tool, new products development, and technology development, and New process innovation, promoted related industry by single products to diversified extends, by General products to high-end products extends, promoted industry expanded capacity, and upgrade grade, nine Xin day of i