15．如图6所示绳子ab能承受的最大拉力为100n用它悬挂一个重50n的物体现在其中点o施加一个水平拉力f缓慢�右拉动当绳子断裂时ao Sketch Coloring Page

15．如图6所示绳子ab能承受的最大拉力为100n用它悬挂一个重50n的物体现在其中点o施加一个水平拉力f缓慢�右拉动当绳子断裂时ao Template

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tomski15．如图6所示绳子ab能承受的最大拉力为100n用它悬挂一个重50n的物体现在其中点o施加一个水平拉力f缓慢�右拉动当绳子断裂时ao coloring

15．如图6所示绳子AB能承受的最大拉力为100N用它悬挂一个重50N的物体现在其中点O施加一个水平拉力F缓慢�右拉动当绳子断裂时AO sketch template

如图所示轻绳AB能承受的最大拉力为100N在它下面悬挂一重为50N的重物通过能承受最大拉力为50N的绳子分两种情况缓慢地拉起重物．第一 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

一轮复习：阿特伍德机类型知乎 sketch template

用一条绳子悬挂一物块物块处于静止状态这时物块所受的作用力是和它们的施力物体是 ——青夏教育精英家教�—— sketch template

如图所示每个�轮重为5N要提升的重物重为120N用来串绕�轮组的绳子能承受的最大拉力是30N．画出能安全提升重物的�轮组的绕法．题目和 sketch template

一根绳子能承受的最大拉力为250N现用这根绳子来提起900N的物体并要求拉力方��下．请设计一个最简单的�轮组在图的方框中画出其装配图 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

用两根绳子吊起一个重物如图10所示如果每根绳所能承受的最大拉力是20104Nsin37＝06sin53＝08求 1吊 sketch template

如图所示是某建�工地用升降机提升大理石的�轮组示意图．�轮组通过固定架被固定住�轮组中的两个定�轮质量相等绕在�轮组上的绳子能承受的最大 sketch template

如图所示是由三个相同的�轮组装成提升重物的装置固定点O所能承受的最大拉力为2300N．在不计绳重和轴的�擦情况下假设绳子足够结实提起 sketch template

如图所示两根等长的绳子AB和BC吊一重物静止两根绳子与水平方�夹角均为60°．现保持绳子AB与水平方�的夹角不变将绳子BC逐渐缓慢地变化 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

如图18所示用�轮组提起重为630N的物体绳子自由端的拉力为300N重物以02m/s的速度匀速上升不计�擦和绳重求1�轮组的机械 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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

15．如图7所示物体G重500N�轮重10N当物体G匀速上升时挂钩B承受的拉力为 N挂钩A承受的拉力为 N拉力F= N若绳子自由 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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

7．一根质量分布均匀的长绳AB在水平外力F的作用下沿光�水平面做直线运动如图甲所示．绳内距A端x处的张力T与x的关系如图乙所示由图可知 sketch template

如图甲所示的�轮组．不计绳重和�擦物体重G从400N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乙记录了在此过程 sketch template

用如图所示的�轮组从15m深的水中提起底面积为200cm2高2m的圆柱形实心物体已知该物体的密度为25×103kg/m3力F作用的绳子 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6所示质量分布均匀的细杆水平放置支座A在杆重心的右侧杆的右端被位于其上面的支座B顶住现在杆的左端C处施加一个�下的作用力则 A 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

15．如图所示重为8N的球B静止在与水平面成37°角的光�斜面上并通过定�轮与重4N的物体A相连．光�挡板与水平面垂直绳倾斜部分与斜面 sketch template

如图所示图钉尖的面积是5×10 5m2图钉帽的面积是1×10 4m2木块能承受的最大压强是6×105Pa．手指至�要用30N的力图钉尖 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物体重G=500N�轮重10N当物体G匀速上升时则挂钩B承受拉力为500500N挂钩A承受255255N的拉力拉力F为 sketch template

21．如图14所示为一曲柄压榨机的示意图其中O为固定铰链杆OA与AB等长在压榨机铰链A处作用的水平力为FOB是铅垂线如果杆和活塞重力 sketch template

用如图10所示的�轮组从15m深的水中提起底面积为200cm2高2m的圆柱形实心物体已知该物体的密度为25×103kg/m3力F作用的 sketch template

游泳时使人前进的施力物体是水手�后划水人就前进这现象说明力的作用是相互的．题目和参考答案——青夏教育精英家教�—— sketch template

题目如图所示边长为10cm的正方体木块A通过细线与圆柱形容器底部相连放入未知某液体中容器中液面与木块上表面相平从打开容器底放液阀 sketch template

如图所示人用50N的力推木箱前进画出该推力的示意图．题目和参考答案——青夏教育精英家教�—— sketch template

如图所示先在一个配有活塞的厚壁玻璃筒里放一小团蘸了乙醚的棉花然后迅速压下活塞筒内棉花燃烧起来．对这一现象的解释是活塞压缩玻璃筒内的空气 sketch template

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