PPT《万有引力定律》

万有引力定律 PPT模板下载:www.

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图表下载:www.1ppt.com/tubiao/ 优秀PPT下载:www.1ppt.com/xiazai/PPT教程: www.1ppt.com/powerpoint/ Word教程: www.1ppt.com/word/Excel教程:www.1ppt.com/excel/ 资料下载:www.1ppt.com/ziliao/PPT课件下载:www.1ppt.com/kejian/ 范文下载:www.1ppt.com/fanwen/ 注意:k值与中心天体有关,而与环绕天体无关. 回顾: 第一定律:所有行星绕太阳运动的轨道都是椭圆,太阳处在椭圆的一个焦点上. 第二定律:对任意一个行星来说,它与太阳的连线在相等的时间内扫过相等的面积. 第三定律:所有行星的轨道的半长轴的三次方跟它的公转周期的二次方的比值都相等. 开普勒行星运动定律 PPT模板下载:www.1ppt.com/moban/ 行业PPT模板:www.1ppt.com/hangye/ 节日PPT模板:www.1ppt.com/jieri/PPT素材下载:www.1ppt.com/sucai/PPT背景图片:www.1ppt.com/beijing/ PPT

图表下载:www.1ppt.com/tubiao/ 优秀PPT下载:www.1ppt.com/xiazai/PPT教程: www.1ppt.com/powerpoint/ Word教程: www.1ppt.com/word/Excel教程:www.1ppt.com/excel/ 资料下载:www.1ppt.com/ziliao/PPT课件下载:www.1ppt.com/kejian/ 范文下载:www.1ppt.com/fanwen/ 思考:是什么原因使行星绕太阳运动呢? 猜想的逻辑顺序:曲线运动―变速运动―加速度―合外力―引力 PPT模板下载:www.1ppt.com/moban/ 行业PPT模板:www.1ppt.com/hangye/ 节日PPT模板:www.1ppt.com/jieri/PPT素材下载:www.1ppt.com/sucai/PPT背景图片:www.1ppt.com/beijing/ PPT

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1、设行星的质量为m,速度为v,行星到太阳的距离为r,则行星绕太阳做匀速圆周运动的向心力太阳对行星的引力来提供

一、太阳对行星的引力 PPT模板下载:www.1ppt.com/moban/ 行业PPT模板:www.1ppt.com/hangye/ 节日PPT模板:www.1ppt.com/jieri/PPT素材下载:www.1ppt.com/sucai/PPT背景图片:www.1ppt.com/beijing/ PPT

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2、天文观测难以直接得到行星的速度v,但可以得到行星的公转周期T 有 代入 PPT模板下载:www.1ppt.com/moban/ 行业PPT模板:www.1ppt.com/hangye/ 节日PPT模板:www.1ppt.com/jieri/PPT素材下载:www.1ppt.com/sucai/PPT背景图片:www.1ppt.com/beijing/ PPT

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3、根据开普勒第三定律 即 所以 代入 PPT模板下载:www.1ppt.com/moban/ 行业PPT模板:www.1ppt.com/hangye/ 节日PPT模板:www.1ppt.com/jieri/PPT素材下载:www.1ppt.com/sucai/PPT背景图片:www.1ppt.com/beijing/ PPT

图表下载:www.1ppt.com/tubiao/ 优秀PPT下载:www.1ppt.com/xiazai/PPT教程: www.1ppt.com/powerpoint/ Word教程: www.1ppt.com/word/Excel教程:www.1ppt.com/excel/ 资料下载:www.1ppt.com/ziliao/PPT课件下载:www.1ppt.com/kejian/ 范文下载:www.1ppt.com/fanwen/ 即 太阳对不同行星的引力,与行星的质量成正比,与行星和太阳间的距离的二次方成反比.