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ID:39797736
大小:2.14 MB
页数:50页
时间:2019-07-11
《高中物理演示课件生活中的圆周运动》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、第五章新知预习·巧设计名师课堂·一点通要点一要点二第7节创新演练·大冲关随堂检测归纳小结课下作业综合提升要点三Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.Createdwith
2、Aspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evalua
3、tiononly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.1.了解圆周运动在日常生活中的实际应用。2.会在具体问题中分析向心力的来源。3.掌握处理圆周运动综合题目的基本方法。4.知道什么是离心现象,知道离心运动的应用和防止。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Eval
4、uationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2
5、011AsposePtyLtd.[读教材·填要点]1.铁路的弯道(1)火车车轮的结构特点:火车的车轮有凸出的轮缘,且火车在轨道上运行时,有凸出轮缘的一边在两轨道内侧,这种结构特点有助于固定火车运动的轨迹,如图5-7-1所示。图5-7-1Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.
6、2.0.0.Copyright2004-2011AsposePtyLtd.(2)火车转弯时存在的问题:如果铁路弯道的内外轨一样高,外侧车轮的轮缘挤压外轨,使外轨发生弹性形变,外轨对轮缘的弹力就是火车转弯的向心力,如图5-7-2所示。但火车太大,靠这种办法得到向心力,轮缘与外轨间的太大,铁轨和车轮极易受损。图5-7-2质量相互作用力Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.C
7、reatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.(3)铁路弯道的特点:①转弯处略高于。②铁轨对火车的支持力FN不是竖直向上的,而是斜向弯道。③铁轨对火车的支持力与火车所受重力的合力指向轨道的,它提供了火车做圆周运动的。外轨内轨内侧圆心向心力Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.E
8、valuationonly.Creat
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