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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tomski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 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

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

用图甲所示的�轮组运送货物上楼每件货物重100N每次运送的量不定乙图绘出了整个过程中�轮组的机械效率随货物重力增加而变化的图象解答下列 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

如图所示在“测�轮组机械效率实验中物体重为G=54N．实验时要竖直�上且匀速匀速拉动弹簧测力计．若物体上升高度为10cm此时弹簧测力 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

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

如图所示人以600N的力�下拉动绕在�轮组的绳子一端10秒使绳端�下移动了15m重物匀速上升了05m已知�轮组的机械效率为70% sketch template

用如图所示�轮组提升重物．人用50N的拉力F15s内使重为90N的物体匀速上升了3m．不计绳重和�擦求1动�轮的重．2人拉绳子 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

某工地用如图所示的�轮组匀速提升质量为600kg的物体在拉了8秒后重物上升08m的过程中求1不计轮绳重和�擦拉力F 的大小．．2 sketch template

如图所示物体B放在水平桌面上物体A通过�轮组拉着物体B此时物体B保持静止状态．当用竖直�下2N的力F1拉重为1N的物体A时能使物体B以 sketch template

百度教育 sketch template

用如图所示的�轮组在20 S内将重600 N的物体从地面竖直提高4 M，所用的拉力是250 N，在这个过程中，求： 1有用功是多�？ 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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

用如图所示的�轮组提升重物所用的拉力是100N动�轮重为80N则用此�轮组能提起 N的重物若将重物提高3m那么绳端要拉过 M．——青 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

一轮复习：阿特伍德机类型知乎 sketch template

某人用如图所示的�轮组匀速提升500N的重物所用的拉力F为300N 绳子自由端被拉下2m在此过程中求�拉力F所做的功 ��轮组的 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

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

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

如图所示工人用�轮组匀速提升重600N的货物所用的拉力F为400N货物在50s内匀速上升5m．在此过程中货物上升的速度是01m/s 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

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

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

如图所示用�轮组将密度为 28×103kg/m3质量为56kg�属块完全在水中匀速提升05m加在绳子自由端的拉力是F动�轮重120N 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

某人用如图所示的�轮组匀速提升500N的重物所用的拉力F为300N 绳子自由端被拉下2m在此过程中求�拉力F所做的功 ��轮组的 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

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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