如图所示�轮与绳子的质量和�擦不计人的重为g1平板重为g2要使人和平板一起匀速下降人对绳的拉力为人对平板的压力为 ——青夏教育 Sketch Coloring Page

如图所示�轮与绳子的质量和�擦不计人的重为g1平板重为g2要使人和平板一起匀速下降人对绳的拉力为人对平板的压力为 ——青夏教育 Template

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tomski如图所示�轮与绳子的质量和�擦不计人的重为g1平板重为g2要使人和平板一起匀速下降人对绳的拉力为人对平板的压力为 ——青夏教育 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与绳子的质量和�擦不计人的重为G1平板重为G2要使人和平板一起匀速下降人对绳的拉力为 人对平板的压力为 ——青夏教育 sketch template

如图所示一人用竖直�下的恒力F作用在绳子的一端C通过绳子和定�轮将一质量为m的静止的物体在水平地面上由A拉到B移动距离s物体在移动过程 sketch template

初中物理杠杆、�轮、功&功率知识回顾搜狐 sketch template

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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

如图所示用�轮组将密度为 28×103kg/m3质量为56kg�属块完全在水中匀速提升05m加在绳子自由端的拉力是F动�轮重120N sketch template

如图甲所示的�轮组每个�轮等重不计绳重和�擦物体重G1从200N开始逐渐增加直到绳子被拉断每次均匀速拉动绳子将物体提升同样的高度图 sketch template

如图所示对于同一高度的两个定�轮AB用一条足够长的绳子跨过它们并在两端分别挂有质量为m1和m2的物体m1≠m2 另在两�轮中间的 sketch template

如图所示对于同一高度的两个定�轮AB用一条足够长的绳子跨过它们并在两端分别挂有质量为m1和m2的物体m1≠m2 另在两�轮中间的 sketch template

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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

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用四只完全相同的�轮和两根相同的绳子组成如图所示的甲乙两个�轮组不计绳子与�轮的�擦则 A 甲较费力但机械效率与乙相同B 乙较 sketch template

一轮复习：阿特伍德机类型知乎 sketch template

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初中物理第四讲之�轮知乎 sketch template

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如图所示用相同的�轮构成甲乙两个�轮组分别把同一个重物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自由端移动的距离 sketch template

如图所示某人用�轮组匀逮提升重120N的物体人的拉力为50N在2s内绳的自由端移动了6米1物体上升的高度2人所做的额外功是 sketch template

如图所示在水平地面上�右做匀速直线运动的汽车通过定�轮用绳子吊起一物体若汽车和被吊物体在同一时刻的速度为υ1和υ2则下面说法正确的是 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

百度教育 sketch template

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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

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

一轮复习：阿特伍德机类型知乎 sketch template

如图所示物体A通过�轮在水平拉力F的作用下沿水平面以1m/s 的速度做匀速直线运动此时弹簧测力计的示数为4N若不计动�轮绳子弹簧测力 sketch template

如图所示光�小圆环A吊着一个重为G1的砝码套在另一个竖直放置的大圆环上今有一细绳拴在小圆环A上另一端跨过固定在大圆环最高点B处的一个光� sketch template

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