2022年人教版必修一第三章《相互作用》单元教案7 .pdf

名师精编优秀教案受力分析复习课一、受力分析顺序：重力、弹力、摩擦力、然后才是考虑是否受其它力的作用；二、受力分析中要注意的是：1、明确研究对象（受力物体），判断是否多了力时可以分别找每个力的施力物体2、判断是否漏掉力时除应按以上次序找外，还应当一个一个方向地找完3、力的方向务必严格遵守力的性质，（如：重力竖直向下，弹力垂直接触面或沿绳收缩方向，摩擦力总与相对运动或相对运动方向相反）4、物体的受力情况必须与物体的运动状态相符合5、当只是根据弹力、摩擦力的产生条件很难做出判断时，有时可以借助二力平衡条件来分析物体的受力情况。三、巩固训练：（假设以下面均粗糙，对物体受力分析，作出它的所受到的所有力）木块受向右的力，向左运动静止在斜面上的木块F 木块受向右的力，沿墙面下滑静止于水平地面上的小球静止的小球静止的小球静止的杆静止的杆静止的杆名师精编优秀教案沿着绳子的方向，且只能产生拉力杆产生的弹力方向：既可以产生拉力也可以产生压力，但不一定沿杆的方向例 1如图所示，处于水平地面上的物体。（1）静止（2）向右运动（3）向右匀速运动例 2如图所示，处于水平地面上的物体。（1）静止（2）向右匀速运动静止的杆静止的球F 文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10名师精编优秀教案（3）向左匀速运动说明：在不考虑物体转动时，可以把物体所受力的作用点画在一点上，一般画在重心。例 3如图所示，物体（1）沿竖直墙面下滑；（2）静止在竖直墙面上；（3）沿竖直墙面匀速下滑。例 4如图所示。（1）物体沿光滑斜面下滑（2）物体沿光滑斜面上滑（3）物体静止在斜面上（4）物体沿斜面匀速下滑（5）物体沿粗糙斜面上滑例 5如图所示，水平传送带上的物体。（1）随传送带匀速运动（2）传送带由静止起动例 6如图所示，倾斜传送带上的物体。（1）向上运输（2）向下运输v F v 文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10名师精编优秀教案例 7如图所示，电梯上的人。（1）随电梯匀速上升（2）刚踏上电梯的瞬间例 8分析光滑球的受力。例题：水平放置的两固定的光滑硬杆OA、OB 成 角，在两杆上各套一个轻环，两环用轻绳相连，现用恒力F 沿 OB 方向拉 D 环，当两环稳定时，绳的张力大小为多少？v A O B C F D 文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 ZG2S9W6F10I10文档编码:CW3L1Y1A2Q7 HE4O1R10W4J10 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