2022年人教版必修一第三章《相互作用》单元教案9 .pdf

名师精编优秀教案物体的受力分析教案教学目标1 加深对三种性质力的概念的理解；2 掌握受力分析的方法与步骤；3 会正确地画出受力分析示意图。4注重培养和提高学生分析问题的能力、知识迁移能力、举一反三的能力教学的重、难点1，重点：学生能正确地进行受力分析，会规范地画出受力图2，难点：摩擦力及摩擦力的方向的判断教学方法探索法学情分析学生初中已经会进行简单的受力分析，在高中需要形成正确进行受力分析的思维方式教学过程（一）新课导入复习：三种性质的力的概念。（二）新课教学用铅笔和直尺(或三角板)画出下列物体的受力分析示意图1.在水平拉力的作用下在水平地面上向右做匀速直线运动的物体2.以某一初速度在水平地面上向左运动的物体3.静止在斜面上的物体名师精编优秀教案4.沿光滑斜面下滑的物体5.以某一初速度沿光滑斜面上滑的物体6.分别画出静止在水平面上的AB 两个物受力分析示意图7.分别画出在水平拉力F 的作用下在水平面上做匀速直线运动的AB 两个物受力分析示意图总结：受力分析的一般步骤（1）确定研究对象，将研究对象从周围的物体中“隔离”出来（2）考虑物体的受力：一般顺序为（重力、弹力、摩擦力）（3）画出受力图8.如图所示在与水平面成30角的拉力 F 的作用下在粗糙的水平地面上右运动的物体A B A B F 30F 文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 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ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3名师精编优秀教案9.下图中均匀物体A 画出 A 受到的力示意图(本题中所有的接触面都是光滑的且物体 A 都是静止的)10.如图所示，在=01 的水平面上向右运动的物体，质量为20 kg在运动过程中，还受到一个水平向左的大小为10N的拉力 F 的作用，画出物体的受力分析示意图图 19 11.如图所示传送带载上货物一起匀速的从底部运送到高处A A A 杆 A A A 文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 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ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3名师精编优秀教案11.下面的物体均处于静止状态杆 A 总结出对物体进行受力分析注意事项1不分析 研究对象对其它物体的力2物体的运动方向上不一定受力3没有转动的物体力的作用点一般画在物体的重心上（平行移动）4根据物体的运动状态检验F 文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 ZN6H8H10Y7O3文档编码:CP9L3W1V1E9 HL8A9E6P2J5 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