- 2022-04-11 发布 |
- 37.5 KB |
- 34页
申明敬告: 本站不保证该用户上传的文档完整性,不预览、不比对内容而直接下载产生的反悔问题本站不予受理。
文档介绍
六年级科学上册课件-8自行车上的简单机械7-教科版(共34张PPT)
8.自行车上的简单机械 自行车是简单、方便、环保的交通工具,很多人喜欢使用它。 找一找:自行车上有哪些简单机械自行车部件简单机械类型所起到的作用 寻找自行车上简单机械的应用应用机械的位置应用机械的类型应用的机械起什么作用龙头(车把)轮轴轻松的控制方向 寻找自行车上简单机械的应用应用机械的位置应用机械的类型应用的机械起什么作用龙头(车把)轮轴轻松的控制方向脚踏板与齿轮轮轴省力 寻找自行车上简单机械的应用应用机械的位置应用机械的类型应用的机械起什么作用龙头(车把)轮轴轻松的控制方向脚踏板与齿轮轮轴省力刹车杠杆省力 寻找自行车上简单机械的应用应用机械的位置应用机械的类型应用的机械起什么作用龙头(车把)轮轴轻松的控制方向脚踏板与齿轮轮轴省力刹车杠杆省力大齿轮与小齿轮轮轴提高转速 寻找自行车上简单机械的应用应用机械的位置应用机械的类型应用的机械起什么作用龙头(车把)轮轴轻松的控制方向脚踏板与齿轮轮轴省力刹车杠杆省力大齿轮与小齿轮轮轴提高转速螺丝与螺帽斜面省力 脚的力量怎样使自行车转动起来的? PPT模板:www.1ppt.com/moban/PPT素材:www.1ppt.com/sucai/PPT背景:www.1ppt.com/beijing/PPT图表:www.1ppt.com/tubiao/PPT下载:www.1ppt.com/xiazai/PPT教程:www.1ppt.com/powerpoint/资料下载:www.1ppt.com/ziliao/范文下载:www.1ppt.com/fanwen/试卷下载:www.1ppt.com/shiti/教案下载:www.1ppt.com/jiaoan/PPT论坛:www.1ppt.cnPPT课件:www.1ppt.com/kejian/语文课件:www.1ppt.com/kejian/yuwen/数学课件:www.1ppt.com/kejian/shuxue/英语课件:www.1ppt.com/kejian/yingyu/美术课件:www.1ppt.com/kejian/meishu/科学课件:www.1ppt.com/kejian/kexue/物理课件:www.1ppt.com/kejian/wuli/化学课件:www.1ppt.com/kejian/huaxue/生物课件:www.1ppt.com/kejian/shengwu/地理课件:www.1ppt.com/kejian/dili/历史课件:www.1ppt.com/kejian/lishi/测量一下,转动自行车的大齿轮1圈,会带动后轮小齿轮转动多少圈?(这样设计有什么好处)注意安全,不要轧了手指啊! PPT模板:www.1ppt.com/moban/PPT素材:www.1ppt.com/sucai/PPT背景:www.1ppt.com/beijing/PPT图表:www.1ppt.com/tubiao/PPT下载:www.1ppt.com/xiazai/PPT教程:www.1ppt.com/powerpoint/资料下载:www.1ppt.com/ziliao/范文下载:www.1ppt.com/fanwen/试卷下载:www.1ppt.com/shiti/教案下载:www.1ppt.com/jiaoan/PPT论坛:www.1ppt.cnPPT课件:www.1ppt.com/kejian/语文课件:www.1ppt.com/kejian/yuwen/数学课件:www.1ppt.com/kejian/shuxue/英语课件:www.1ppt.com/kejian/yingyu/美术课件:www.1ppt.com/kejian/meishu/科学课件:www.1ppt.com/kejian/kexue/物理课件:www.1ppt.com/kejian/wuli/化学课件:www.1ppt.com/kejian/huaxue/生物课件:www.1ppt.com/kejian/shengwu/地理课件:www.1ppt.com/kejian/dili/历史课件:www.1ppt.com/kejian/lishi/小齿轮:16个齿大齿轮:32个齿 PPT模板:www.1ppt.com/moban/PPT素材:www.1ppt.com/sucai/PPT背景:www.1ppt.com/beijing/PPT图表:www.1ppt.com/tubiao/PPT下载:www.1ppt.com/xiazai/PPT教程:www.1ppt.com/powerpoint/资料下载:www.1ppt.com/ziliao/范文下载:www.1ppt.com/fanwen/试卷下载:www.1ppt.com/shiti/教案下载:www.1ppt.com/jiaoan/PPT论坛:www.1ppt.cnPPT课件:www.1ppt.com/kejian/语文课件:www.1ppt.com/kejian/yuwen/数学课件:www.1ppt.com/kejian/shuxue/英语课件:www.1ppt.com/kejian/yingyu/美术课件:www.1ppt.com/kejian/meishu/科学课件:www.1ppt.com/kejian/kexue/物理课件:www.1ppt.com/kejian/wuli/化学课件:www.1ppt.com/kejian/huaxue/生物课件:www.1ppt.com/kejian/shengwu/地理课件:www.1ppt.com/kejian/dili/历史课件:www.1ppt.com/kejian/lishi/测量一下,转动小齿轮1圈,大齿轮会转几圈?注意安全,不要轧了手指啊! PPT模板:www.1ppt.com/moban/PPT素材:www.1ppt.com/sucai/PPT背景:www.1ppt.com/beijing/PPT图表:www.1ppt.com/tubiao/PPT下载:www.1ppt.com/xiazai/PPT教程:www.1ppt.com/powerpoint/资料下载:www.1ppt.com/ziliao/范文下载:www.1ppt.com/fanwen/试卷下载:www.1ppt.com/shiti/教案下载:www.1ppt.com/jiaoan/PPT论坛:www.1ppt.cnPPT课件:www.1ppt.com/kejian/语文课件:www.1ppt.com/kejian/yuwen/数学课件:www.1ppt.com/kejian/shuxue/英语课件:www.1ppt.com/kejian/yingyu/美术课件:www.1ppt.com/kejian/meishu/科学课件:www.1ppt.com/kejian/kexue/物理课件:www.1ppt.com/kejian/wuli/化学课件:www.1ppt.com/kejian/huaxue/生物课件:www.1ppt.com/kejian/shengwu/地理课件:www.1ppt.com/kejian/dili/历史课件:www.1ppt.com/kejian/lishi/小齿轮:16个齿大齿轮:32个齿 把我们的发现写下来:大齿轮带动小齿轮,转动速度变。小齿轮带动大齿轮,转动速度变。快慢 变速自行车上大齿轮有几个?小齿轮有几个?这些小齿轮在起什么作用? 大齿轮齿数小齿轮齿数大齿轮转1圈小齿轮转的圈数32201圈32161圈32121圈 大齿轮齿数小齿轮齿数大齿轮转1圈小齿轮转的圈数32201圈1.6圈32161圈32121圈 大齿轮齿数小齿轮齿数大齿轮转1圈小齿轮转的圈数32201圈1.6圈32161圈2圈32121圈 大齿轮齿数小齿轮齿数大齿轮转1圈小齿轮转的圈数32201圈1.6圈32161圈2圈32121圈约2.67圈 这节课我们学习了什么知识?了解一些简单机械在自行车上的使用. 同时注意: 谢谢查看更多