如图所示�轮a和b均将重力均为20牛的物体匀速提升不计�轮重和�擦则力f1的大小为2020牛力f2为1010牛�轮a相当于一个等臂等 Sketch Coloring Page

如图所示�轮a和b均将重力均为20牛的物体匀速提升不计�轮重和�擦则力f1的大小为2020牛力f2为1010牛�轮a相当于一个等臂等 Template

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tomski如图所示�轮a和b均将重力均为20牛的物体匀速提升不计�轮重和�擦则力f1的大小为2020牛力f2为1010牛�轮a相当于一个等臂等 coloring

如图所示�轮A和B均将重力均为20牛的物体匀速提升不计�轮重和�擦则力F1的大小为2020牛力F2为1010牛�轮A相当于一个等臂等 sketch template

如图物体A和B的重力分别为11N和7N不计弹簧秤细线的重力和一切�擦则地面对 A物体的支持力和弹簧秤的读数为A．4N7N B．5N sketch template

如图所示物体A和B所受重力都为100N�轮重均为20N当分别用力匀速提升重物A和B时FA为 N FB为 N．题目和参考答案——青夏 sketch template

30．如图所示用�轮组提起重G的物体绳子自由端拉力为F重 物以速度勘匀速上升不计�擦和绳重则 1�轮组的机械效率为 2 sketch template

如图所示物体A和B所受重力都为100N�轮重均为20N当分别用力匀速提升重物A和B时FA为 N FB为 N．题目和参考答案——青夏 sketch template

如图所示�轮可以看作是等臂杠杆若物体所受重力均为20牛且处于静止状态不计�擦和�轮重力力F2的大小为 牛物体上升时它的重力势能 sketch template

一轮复习：动态平衡问题解题技巧知乎 sketch template

如图所示物体A和B所受重力都为100牛不考��轮重力及绳与�轮的�擦当用力分别匀速提起物体A和B时力FA为5050牛若物体B在10秒 sketch template

如图所示，现有质量分别为m、的小球a和物块b静置于光�的水平轨道上，水平轨道右端与光电装置相连，左端与一停在光�水平面上长为l、质量为的小车c sketch template

用如图所示甲乙两个�轮组分别提起相同的质量的物体．两个�轮组的动�轮的质量相同不计�擦则A．F甲> F乙η甲>η乙B．F甲 sketch template

用四个�轮和两根相同的绳子组成如图所示的甲、乙两个�轮组用它们匀速提起货物在绳自由端施加竖直的拉力分别为F甲和F乙物重分别为G甲和G乙 sketch template

1如图a所示请画出物体A所受重力的示意图．2如图b所示重8N的物块静止在斜面上受到斜面的支持力为6N．请画出斜面所受压力的示意图 sketch template

如图5所示的皮带传动装置中轮A和B同轴ABC分别是三个轮边缘上的质点且rA=rC=2rB则三个质点的�心加速度之比aAaBaC sketch template

如图所示半径为R的圆轮在竖直面内绕O轴匀速转动轮上ab两点与O点的连线相互垂直ab两点均粘有一小物体当a点转至最低位置时ab sketch template

一轮复习：阿特伍德机类型知乎 sketch template

按要求作图1如图1所示画出物体所受重力的示意图．2用如图2所示的两个�轮组成一个�轮组提升重物要求拉力为物重的三分之一忽略�擦 sketch template

一轮复习：阿特伍德机类型知乎 sketch template

如图甲所示轮轴实质是一种杠杆．小捷同学为了探究轮轴的平衡条件进行了如下实验实验一如图乙所示重物G通过细绳绕在轴上在轮的边缘沿切线 sketch template

如图所示皮带传动中O1O2两轮的轴固定当主动轮O1先逆时针转动时不打�的皮带也使从动轮O2逆时针转动试确定两轮边缘上的A点和B点所 sketch template

如图所示�轮重力和�擦均不计物体重均为100N与水平面间的�擦力都是30N作用于各绳端的拉力分别为F1F2F3．要使物体做匀速 sketch template

如图5所示O1为皮带传动装置的主动轮的轴心轮的半径为r1O2为从动轮的轴心轮的半径为r2r3为与从动轮固定在一起的大轮的半径已知 sketch template

如图所示两个�属轮A1A2可绕通过各自中心并与轮面垂直的固定的光��属轴O1和O2转动O1和O2相互平行水平放置每个�属轮由四根 sketch template

如图所示O1轴上有两个转动轮大轮半径为2r小轮的半径为r轮O2的半径为 R对于轮缘上的ABC三点则ωAωBωC=112 sketch template

如图所示拉B物的轻绳与竖直方�成60°角O为一定�轮物体A与B间用跨过定�轮的细绳相连且均保持静止已知B的重力为100N水平地面对B sketch template

如图所示轮O1O3固定在同一轮轴上轮O1O2用皮带连接且不打�在O1O2O3三个轮的边缘各取一点ABC已知三个轮的半径比 sketch template

一轮复习：动态平衡问题解题技巧知乎 sketch template

如图所示是一主动轮A通过皮带带动从动轮B的示意图主动轮的转动方�为顺时针方�则关于主动轮上M点受到的静�擦力方�和从动轮上N点受到的静�擦 sketch template

槽轮机构快懂百� sketch template

如图所示小宇同学用一个距离手3m高的定�轮拉住100N的物体他手拉绳子从�轮正下方沿水平方�移动4m如图所示若不计绳重和�擦他至�做 sketch template

如图所示叠放在一起的物体A和B在大小为F的恒力作用下沿水平面做匀速直线运动则下列结论中正确的是 A．甲乙两图中A物体所受的�擦力大小均 sketch template

如图所示四个�轮组如果�轮的重力和一切�擦及丙组的板重不计重物G的重力为600N．要将重物匀速提起四种情况下拉力F分别为F甲= F乙 sketch template

一轮复习：阿特伍德机类型知乎 sketch template

如图所示是皮带传动装置示意图A为主动轮B为从动轮．关于A轮边缘上P点B轮边缘上Q点受�擦力的方�下列说法中正确的是APQ点所受�擦 sketch template

如图所示皮带转动轮大轮直径是小轮直径的2 倍A是大轮边缘上一点B是小轮边缘上一点C是大轮上一点C到圆心O1的距离等于小轮半径转动 sketch template

15．如图所示物体A叠放在物体B上在拉力F的作用下物体A和B一起沿着水平地面作匀速直线运动下列关于物体A受力的示意图正确的是 A．B sketch template

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