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如图所示甲乙两个�轮组通过细绳悬挂在天花板上用�轮组匀速提升重为600n的物体时悬挂甲乙两�轮组的细绳所受的拉力分别为f甲f乙 Template






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sketch 5138 Monster by Leonie Cooper
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sketch 3707 The Thinker
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sketch 4891 Pikachu by Resul Danacı

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tomski如图所示甲乙两个�轮组通过细绳悬挂在天花板上用�轮组匀速提升重为600n的物体时悬挂甲乙两�轮组的细绳所受的拉力分别为f甲f乙 coloring
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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
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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
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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
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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
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如图所示甲乙两个轮组通过细绳悬挂在天花板上用轮组匀速提升重为600N的物体时悬挂甲乙两轮组的细绳所受的拉力分别为F甲F乙 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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如图所示用两个轮分别匀速提升AB两个物体拉细绳的力F大小相等在相同时间内物体上升的距离也相等绳重及擦不计轮的质量小于物体的 sketch template
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甲、乙两个轮组如图所示 其中的每一个轮重力都相同 用它们分别将重物G1、G2提高相同的高度 不计轮组的擦 出卷 sketch template
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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
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如图所示，完全相同的轮，用相同的绳子绕成甲、乙两个轮组，分别提起重为G 1和G 2的两个物体，比较它们省力情况和机械效率，若不计绳重和擦 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
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利用如图所示的甲乙两轮组在相同的时间内用大小相同的力F1和F2分别把质量相等的重物G1和G2提升到相同的高度则 A．甲轮组的机械 sketch template
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如图所示用两个轮分别匀速提升AB两个物体拉细绳的力F大小相等在相同时间内物体上升的距离也相等绳重及擦不计轮的质量小于物体的 sketch template
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22．如图所示用定轮和动轮分别将质量相同的甲乙两物体匀速提升相同的高度不计绳重与擦且动轮重G动小于乙物体的物重G则所用的拉力 sketch template
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如图所示的甲乙两个轮组所用轮都相同分别把同一重物匀速提升相同的高度．若不计绳重及擦下列说法正确的是 A．F1=F2B．乙轮 sketch template
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百度教育 sketch template
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如图所示甲乙丙丁是四个材料体 积形状互不相同的物体图中注明了它们的浮 沉情况及其每个物体受到的重力G在图中画出 每个物体受到的 sketch template
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如图所示不计绳重和擦沿三种不同的方拉绳使物体匀速上升所用的力分别是F1F2F3则A．F1最大 B．F2最大 C．F3最大 D sketch template
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如图所示甲乙两个正方体物块放置在水平地面上甲的边长小于乙的边长甲对地面的压强为p1乙对地面的压强为p2如果甲乙物块的 A sketch template
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如图所示甲乙两个均匀的实心圆柱体放在水平地面上质量相等则下列判断正确的是 A．甲的密度大甲对地面的压强小B．甲的密度小甲对地面 sketch template
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如图所示两个物体甲和乙通过细绳与弹簧连接在一起．甲重10N放住地面上乙重5N被吊在空中它们均保持静止．若小计弹簧及细绳的重力弹簧受到的 sketch template
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用相同轮和绳子分别组成如图所示甲乙两个轮组绳子所能承受的最大拉力相同．不计绳重及擦两装置匀速提升物体的重力最大时则下列说法正确的 sketch template
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6．如图所示甲乙两轮组中所使用的轮相同仅绳的绕法不同下列说法正确的是 A．甲轮组更省力机械效率也更高 B．乙轮组更省力机械 sketch template
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12．如图所示用相同的轮和绳子分别组成的甲乙两个轮组把相同的钩码提升相同的高度在不计绳重及机械擦的情况下甲所用的拉力 乙所用的 sketch template
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如图所示甲乙两个物块分别系在一条跨过定轮的轻绳两端已知甲的质量为300g乙的质量为100g不计擦g取10m/s2则甲乙运动 sketch template
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如图所示甲乙两个物块分别系在一条跨过定轮的轻绳两端已知甲的质量为300g乙的质量为100g不计擦g取10m/s2则甲乙运动 sketch template
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如图所示甲乙为两个由同种均匀导线绕成的大小相同的属圆环只是甲是闭合的而乙断开一个缝隙两圆环固定在同一水平面上一个磁铁分别从同一 sketch template
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12．如图所示用相同的轮和绳子分别组成的甲乙两个轮组把相同的钩码提升相同的高度在不计绳重及机械擦的情况下甲所用的拉力 乙所用的 sketch template
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如图所示甲乙两个学生各乘一辆小车在光的水平面上做抛球游戏．已知甲车上有质量m=1kg的小球若干个甲和他的车及所带小球的总质量为M1 sketch template
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如图所示甲乙两位同学做“拔河 游戏．两人分别用伸平的手掌托起长凳的一端保持凳子水平然后各自两侧拖拉．若凳子下表面各处的粗糙程度相同 sketch template
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如图所示已知甲乙两个相同的验电器甲带负电乙不带电拿一根有绝缘柄的属杆把两个验电器连接起来．下列说法正确的是 A．甲验电器的属箔 sketch template
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如图所示甲乙是两个完全相同的球．在同一高度以大小相等的速度同时将甲球竖直下抛出将乙球竖直上抛出两球在地面上反复弹跳．不计空气 sketch template
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如图所示甲、乙两个相同的圆台形容器以不同的方式放在水平桌面上容器内装有深度相同、质量相同、密度不同的A、B液体则两液体密度ρA > ρB sketch template
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百度教育 sketch template
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如图所示甲乙两个实心等高圆柱体是由同种材料制成的放在水平面上则它们对水平面的压强大小是 A．甲大B．乙大C．一样大D．无法比较 sketch template