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

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

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中L1L2L3三根绳子能够承受的最大拉力相同现不断加大所系重物G三根绳子断折的情况是 A．L1先断B．L2先断C．L3先断 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

一轮复习：阿特伍德机类型知乎 sketch template

一轮复习：“活结”和“死结”模型知乎 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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

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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

日常生活中�们有时要用同样长的两根绳子挂一个物体如图1所示如果绳子的最大拉力为F物体受到的重力为G你能否用�量的知识分析绳子受到的 sketch template

利用如图所示的装置工人用力F把重为100N的物体以02m/s的速度匀速提升6m．若不计绳重和�擦则这一过程中 A拉力F的大小为 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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

14．如图所示在水平桌面上沿直线拉动木块下列属于一对平衡力的是 A．绳子对木块的拉力和木块对绳子的拉力B．手对绳子的拉力和桌面对木块的 sketch template

如图所示两条悬绳OAOB结于O点O点下方挂一重物GAB两点系在水平天花板上OA绳与天花板之间的夹角为53°OB绳与天花板之间的 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

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

如图所示一个人用一根长1 M只能承受46 N拉力的绳子拴着一个质量为1 Kg的小球在竖直平面内做圆�运动已知圆心O离地面h=6 M 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

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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

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

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

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

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

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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

如图所示一个物体由绕过定�轮的绳拉着分别用图中所示的三种情况拉住在这三种情况下若绳的张力分别为T1T2T3轴心对定�轮的支持力 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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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