如图所示�轮组在拉力f1的作用下拉着重300n的物体a以1ms的速度在水平面上匀速移动物体a匀速运动时受的阻力为70n拉力f的功率为 Sketch Coloring Page

如图所示�轮组在拉力f1的作用下拉着重300n的物体a以1ms的速度在水平面上匀速移动物体a匀速运动时受的阻力为70n拉力f的功率为 Template

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tomski如图所示�轮组在拉力f1的作用下拉着重300n的物体a以1ms的速度在水平面上匀速移动物体a匀速运动时受的阻力为70n拉力f的功率为 coloring

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�轮组在拉力F1的作用下拉着重300N的物体A以1m/s的速度在水平面上匀速移动物体A匀速运动时受的阻力为70N拉力F的功率为 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

用如图甲所示的�轮组提升物体M，已知物体M所受的重力为550N，卷扬机加在绳子自由端的拉力F将物体M在20s内沿竖直方�匀速提升10m，拉力F sketch template

如图所示，用�轮组帮助汽车脱困，汽车被水平匀速拉动12m时，作用在绳子自由端的拉力F为1000N，绳子自由端移动的速度为06m/s，�轮组 sketch template

一轮复习：动态平衡问题解题技巧知乎 sketch template

初中物理第四讲之�轮知乎 sketch template

�轮组问题解析知乎 sketch template

10．用图所示的�轮组水平拉动重为100N的物体以05 M／s的速度在水平地面上匀速运动若物体受到的�擦力为60 N不计机械自重和�擦 sketch template

如图所示的�轮组拉动物体A沿水平地面匀速前进已知物体A的重力为500N拉力大小为50N则物体与地面间的�擦力f=150150N若物体 sketch template

如图所示用一机械效率为90%�轮组拉着重900N的物体A沿水平方�在40s内匀速移动了8m拉力F所做的功为1200J．则 A．拉力的 sketch template

一轮复习：阿特伍德机类型知乎 sketch template

如图所示是一个从隧道中运矿石的装置图用�轮组拉着重600N的货车A沿水平方�匀速运动货车受到的�擦力是货车重力的02倍．在40s内物体 sketch template

如图所示用�轮组提起重900N的物体绳子自由端拉力F为400N重物在20s内匀速上升了10m求1提起重物所做的有用功．2拉力 sketch template

10．用相同的定�轮和动�轮组成甲乙两个�轮组如图8所示用它们来提升同一重物甲�轮组将重物举高1m乙�轮组将重物举高2m在不计绳 sketch template

某人用如图15所示的�轮组吊起一个重1000N的物体�轮组的机械效率为80%他在5s内使绳子自由端移动8m求 1物体上升的高度和 sketch template

如图甲所示放在水平地面上的物体受到方�不变的水平拉力F的作用其F﹣t和V﹣t图象分别如乙丙所示由图象可知当t=3s时物体受到的 sketch template

如图所示偏心轮�杆机构中，�杆O1 A 借助弹簧压在半径为R的偏心简答题试题答案 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

百度教育 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

如图所示分别用甲乙两个�轮组提起重力G1=G2的重物至相同的高度h若所用拉力F1=F2已知甲的机械效率50%则A 乙的机械效率75 sketch template

一轮复习：动态平衡问题解题技巧知乎 sketch template

如图所示分别用两个�轮组在相同的时间内将重相同的物体G匀速提升相同的高度每个�轮的重均相同．不计绳重及�擦此过程中 A．甲的机械 sketch template

一轮复习：阿特伍德机类型知乎 sketch template

一轮复习：动态平衡问题解题技巧知乎 sketch template

如图所示的�轮组利用它将200N的重物提起效率为80%则拉力F为 N当重物上升1m时总功 J其中额外功为 J如果不计绳重及轮与轴 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

小明利用如图所示的�轮组将重为900N的物体从一楼匀速提升到六楼所用的拉力为360N绳子自由端移动的速度为03m/s．求1小明所用 sketch template

用如图所示的�轮组匀速提升浸没在水中的物体，已知G=3900N。圆柱形容器底面积S=06m²，物体浸没在水中时水面高度为100cm，当物体 sketch template

一轮复习：阿特伍德机类型知乎 sketch template

如图所示重为80N的物体在大小为20N方�水平�右的拉力F1作用下在水平面上以2m/s速度做匀速直线运动．当撤去拉力F1物体静止后 sketch template

如图所示用�轮组拉着重600N的物体A沿水平方�匀速移动在40s要内物体移动了8m拉力F做的功为1280J求1求拉力F的大小和 sketch template

如图所示用相同的�轮构成甲乙两个�轮组在相等的时间内分别把同一个重物匀速提升相同高度不计绳重及�擦下列说法正确的是 A．绳子自由 sketch template

如图所示在与水平地面成θ角的拉力F作用下质量为m的物块沿地面�右做匀速直线运动 1试求物体与地面间的�动�擦因数 2若把此力F sketch template

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