16．如图所示的�轮组匀速拉起重3牛的物体若不考�动�轮和绳重及�擦绳自由端的拉力为 牛若绳端的实际拉力为2牛物体在4秒内被匀速提高0 Sketch Coloring Page

16．如图所示的�轮组匀速拉起重3牛的物体若不考�动�轮和绳重及�擦绳自由端的拉力为 牛若绳端的实际拉力为2牛物体在4秒内被匀速提高0 Template

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sketch #3138 Papa Smurf by Courtney Spragg

anonymous

anonymous
sketch #3138 Papa Smurf by Courtney Spragg

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anonymous

anonymous
sketch #4883 White tiger by Kayson Danielle

sketch #2616 Green Day by sketchmaster

sketchmaster
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sketch #5140 Jigsaw by Lajla Nygaard Laursen

anonymous

anonymous
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sketch #2818 Hellboy by يآآسر محمد

يآآسر محمد
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sketch #5131 Miley Cyrus by Vannak Von

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anonymous
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sketch #3670 Bugs Bunny by Jessica Column

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anonymous
sketch #3670 Bugs Bunny by Jessica Column

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anonymous

anonymous
sketch #3247 Thor by Juvenilia Alexandrino

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sketchmaster
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anonymous
sketch #4869 Madara by Jean-Benoit Renaud

sketch #3707 The Thinker

anonymous

anonymous
sketch #3707 The Thinker

sketch #2828 One Direction Szabó Zoltán

Szabó Zoltán
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sketchmaster
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sketch #859 meyvalar

anonymous

anonymous
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anonymous
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anonymous

anonymous
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sketch #5094 Squirrel by Mehdi Público

anonymous

anonymous
sketch #5094 Squirrel by Mehdi Público

sketch #3222 Late happy valentine&#;s from Tiffa Hidalgo Jordan Coquet

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sketch #3222 Late happy valentine&#;s from Tiffa Hidalgo Jordan Coquet

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sketch #2877 Elvis by Karoline Castillo

anonymous

anonymous
sketch #2877 Elvis by Karoline Castillo

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sketch #90 JF Style!

Jaroslav Florian
sketch #90 JF Style!

tomski16．如图所示的�轮组匀速拉起重3牛的物体若不考�动�轮和绳重及�擦绳自由端的拉力为 牛若绳端的实际拉力为2牛物体在4秒内被匀速提高0 coloring

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

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

16．如图所示的�轮组匀速拉起重3牛的物体若不考�动�轮和绳重及�擦绳自由端的拉力为 牛若绳端的实际拉力为2牛物体在4秒内被匀速提高0 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

16．如图所示的�轮组匀速拉起重3牛的物体若不考�动�轮和绳重及�擦绳自由端的拉力为 牛若绳端的实际拉力为2牛物体在4秒内被匀速提高0 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=06m²，物体浸没在水中时水面高度为100cm，当物体 sketch template

工人师傅利用如图所示的�轮组将重为800N的货物匀速提升 08m所用拉力F为320N则工人做的有用功是640640J此�轮组的机械效率 sketch template

10．用图所示的�轮组水平拉动重为100N的物体以05 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用F为40 N的拉力通过�轮组拉着重为300 N的物体A在水平面上以04 M/s的速度�左做匀速直线运动物体受到的�擦力是物重 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

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

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

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03m/s．求1小明所用 sketch template

16．如图所示左边是探究某根弹簧的伸长量x与所受拉力F之间关系的实验图根据实验数据得到右边图线 �写出图线代表的函数 X用m做单位 sketch template

�轮和功功率 Word文档在线阅读与下载免费文档 sketch template

用如图所示的�轮组提升重物人用500N的拉力F在20s内使重为800N的物体匀速上升了3m．不计绳重和�擦则人拉绳子做功的功率和�轮组的 sketch template

图9 34甲所示是起重机起吊2t货物时的示意图，�轮组钢绳的绕法如图9 34乙所示当货物以1m/s的速度上升2m后再水平移动3m，已知�轮组 sketch template

如图所示的两个�轮组分别把重力相等的两个物体提升相同的高度所用的拉力F1=F2比较两拉力所做的功W1．W2及两�轮组的机械效率η1．η2 sketch template

初中物理第四讲之�轮知乎 sketch template

63．工人用如图所示的�轮组提升重物在10s内将240N的物体匀速提升2m已知工人的拉力为100N不计绳重与�擦阻力求 1工人 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

6．用如图所示的�轮组提升物体当作用在绳子末端的 拉力F为10N时物体被匀速提高50cm在此过程中 拉力F做的功为 J若�轮组的机械 sketch template

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

在图所示的�轮组中用110N的力在5s内把重为200N的物体匀速提高2m则 A．对重物做的有用功约为200J B．�轮组的机械效率约为90 sketch template

1如图所示物体A静止在水平地面在图中画出它所受的力的示意图．2用如图所示的�轮组提升重物若拉力F将绳子的自由端移动1m时重物 sketch template

在“探究影响�轮组机械效率的因素”实验中，某同学用如图20所示的同一�轮组分别做了三次实验，实验数据记录如下：实验次数钩码重/N 钩码上升 sketch template

在“测�轮组机械效率 的实验中小明用如图甲所示的�轮组进行了五次实验实验数据如下表实验次数物重 G/N 物体上升的高度h/cm 测 sketch template

分别用如图所示的两个�轮组将同一物体提升到相同高度．若物体受到的重力为100N动�轮的重力为10N．把物体匀速提升1m的过程中下列说法不 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

百度教育 sketch template

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

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�轮组相同钩码相同甲挂一个钩码乙挂两个钩码用�轮组将钩码提升相同的高度不计绳子与�轮的�擦和绳重下列说法正确的是 sketch template

如图所示一个小电动机通过�轮组匀速拉动物体在水平面上运动．物体质量为3kg受到地面的�擦阻力为其所受重力的01倍．若�轮组对物体所做的功 sketch template

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