5杠杆及其应用练习题(含答案)及答案答案.pdf

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1、初中物理 机械和力(二)四、杠杆1、杠杆是一根在力的作用下能绕着固定的点转动的；杠杆绕着转动的点叫做，常用字母“”表示；作用在杠杆上，使杠杆转动的力叫做，常用字母“”表示，沿着该力的方向，向两边延长所画的直线叫做；作用在杠杆上，阻碍杠杆转动的力叫做，常用字母“”表示，沿着该力的方向，向两边延长所画的直线叫做。2、力臂：就是从支点到力的作用线的距离（实际就是在几何学上，到的距离）。从支点到动力作用线的距离叫做常用字母“”表示；从支点到阻力作用线的距离叫做，常用字母“”表示。3、画出下列(1)-(7)杠杆的对应力臂。4、（不做）如图（8）所示，是探究“杠杆平衡条件”的实验装置。在探究时，一般将杠杆

2、的中心（即杠杆的）支撑在支架上，这样做的目的是使杠杆的重力通过，避免杠杆本身的重力对“杠杆平衡”的影响；在未挂钩码时，螺母A、B 的作用是，这样做的目的是使力的力臂与杠杆，便于测量力臂的大小；挂上钩码后，发现杠杆未在水平位置上平衡，则应。5、杠杆平衡条件是，其数学表达式是；6、根据“杠杆平衡条件”可以把杠杆分为三种情况：其中动力臂大于阻力臂的杠杆是杠杆，它虽然省了力，却费了；另一种是动力臂小于阻力臂的杠杆，是杠杆，它虽然费了力，却省了；还有一种是动力臂等于阻力臂的杠杆，是杠杆，它既不省力，也不费力；天平是杠杆。7、用一根轻质硬棒撬起一重 600N的石头，其动力臂是 1m，阻力臂是20cm，撬起

3、这块石头至少要N的动力。8、在一根轻质杠杆上，已知动力是100N，阻力臂是 30cm,则：(1)若阻力是 500N，那么动力臂是m；（2）若动力臂是 5dm，那么阻力是N；(3)若阻力与动力之比为 41，那么动力臂是m；（4）若动力臂是阻力臂的 3倍，那么阻力是N。9、如图，OAAB为23，已知F=200N，那么物体受到的重力为多少 N？物体的质量为多少 kg？若物体是一个边长为 5dm的实心正方体，则物体的密度是多少 kg/m3?(g=10N/kg)10、如图(10)所示，在杠杆上的 A 点挂一重物，在 C点对杠杆施加一个最小的力，使杠杆平衡在图中所示的位置试画出这个力的示意图和力臂11、在

4、图(11)中，AB是一根自重为 100N的均匀木棒，B端着地，在 A端用最小的力 F时，恰好在如图位置处于平衡状态，请画出力 F的图示。试计算 F=N。12、如图(12)所示，杠杆AO 在力 F1、F2的作用下处于静止状态L2是力 F2的力臂，在图中画出力 F1的力臂 L1和力 F2在杠杆上位置和方向。13、如图(13)所示，是一个重为 1 103N油桶的纵截面，已知油桶底面文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP

5、6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U

6、5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP

7、6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U

8、5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP

9、6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U

10、5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP

11、6O3D3T7B2直径是 30cm，高为40cm,在油桶 A点处作用最小力 F时，油桶恰好能绕B点翻转，请在如图位置上画出最小力F的方向。试计算 F=N。14、如图(14)所示，是一个重为 1 105N的油桶，现要用最小的力F作用在油桶上，使油桶能绕B点滚上台阶，请在如图位置上画出最小力F的方向。15、如图(15)所示，Z字形杠杆的 A点处悬挂一个重为 600N的物体，请在如图的 C点处画出使杠杆保持平衡的最小力F的方向。已知：OA=BC=40cm，OB=30cm，试计算 F=N。.16、如图（16）所示，画出拉力 F对支点O的力臂。17、如图所示的四种工具中，属于费力杠杆的是18、根据图示情

12、况画出以下滑轮组最省力的绳子绕法：（用刻度尺或三角板将绳子画直）起 子A 道钉撬B 筷 子C 钢丝钳D 文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3

13、T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1

14、 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3

15、T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1

16、 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3

17、T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1

18、 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B218 题提示。物体向上运动。人在上面，则不能改变拉力方向，即绳子末端绕动滑轮。人在下面，这必须改变拉力方向，则绳子末端绕定滑轮。若人的位置无要求，最省力则N 最大。初中物理 机械和力(二)参考答案四、杠杆五、1.硬棒支点O 动力F1 动力作用线阻力F2 力

19、作用线2.点线动力臂L1 阻力臂L2 3.略（做完杠杆作图题还不会做这道题的童鞋，面壁暑假）4.支点5.动力 X 动力臂=阻力 X 阻力臂F1L1=F2L2 文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N

20、7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文

21、档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N

22、7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文

23、档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N

24、7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文

25、档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B26.省力距离费力距离等臂等臂7.120 8.（1）1.5（2）166.67（3）1.2（4）300 9.解：（大概过程）由F1L1=F2L2 得：200NOB=OA G 由 OAAB=23 得：OAOB

26、=2 5 则 G=500N 由 G=mg，密度=m/v 得。物体的密度是400kg/m3 10.要求力最小，则对应力臂最长，连接 OC 为力臂，力的作用线垂直力臂。如图所示11.求力最小，则对应力臂最长，即AB 为力臂，如图所示12.如图所示13.如图所示。提示：AB 是力臂。由勾股定理得AB=50cm。由F1L1=F2L2 得：1000N15cm=F50cm。则 F=（注意重力力臂是哪条）文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B

27、8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编

28、码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B

29、8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编

30、码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B

31、8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编

32、码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B

33、8B8J1 ZP6O3D3T7B214.如图所示要求力最小，则对应力臂最长，园直径最长。15.如图所示：要求力最小，则对应力臂最长。F=480N 16.如图所示17.C 18.文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5

34、Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6

35、O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5

36、Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6

37、O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5

38、Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2文档编码:CF3T5U5Y1C7 HC2N7B8B8J1 ZP6O3D3T7B2