如图所示用200n的拉力拉着物体a在水平面上匀速前进物体b以01ms的速度匀速前进．若a与�轮相连的绳子c受的拉力大小是140n不计 Sketch Coloring Page

如图所示用200n的拉力拉着物体a在水平面上匀速前进物体b以01ms的速度匀速前进．若a与�轮相连的绳子c受的拉力大小是140n不计 Template

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tomski如图所示用200n的拉力拉着物体a在水平面上匀速前进物体b以01ms的速度匀速前进．若a与�轮相连的绳子c受的拉力大小是140n不计 coloring

如图1所示小雨用200N的拉力利用�轮组在空中匀速提升密度为3×103kg/m3的物体A此时机械效率为90%不计绳重�擦和水的阻力求 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

1如图1所示工人用200N的沿斜面�上的推力将一个物重为300N的木箱推上斜面．请作出木箱受到的重力和推力的图示．2如图2所示一 sketch template

如图所示工人用200N的沿斜面�上的拉力将一个物重为300N的木箱拉上斜面．请作出木箱受到的重力和拉力以及对斜面的压力的示意图．题目和 sketch template

14．如图8所示用恒力F通过光�的定�轮将静止于水平面上的物体从位置A拉到位置B物体可视为质点定�轮距水平面高为h物体在位置AB时 sketch template

力的合成中两类最小值问题知乎 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200N的拉力拉着物体A在水平面上匀速前进物体B以01m/s的速度匀速前进．若A与�轮相连的绳子C受的拉力大小是140N不计 sketch template

如图所示用200N的拉力拉着物体A在水平面上匀速�左运动物体A与�轮相连的绳子所受的拉力为A所受�擦力的4倍若不计�轮重绳重及�轮装置 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

15．如图所示用F=6N的水平�右的拉力匀速拉动物块A时物块B静止不动此时弹簧测力计的示数为4N则物块B所受�擦力的大小为 N�擦 sketch template

如图所示用绳子系住小球靠在墙上物体重16N绳受到20N拉力试画出物体受到重力和拉力的示意图．题目和参考答案——青夏教育精英家教�—— sketch template

24．如图7所示物体挂在弹簧测力计下用力的示意图表示出物体所受拉力的三要素——青夏教育精英家教�—— sketch template

6．如图2所示水平地面上的物体A在斜�上的拉力F作用下�右作匀速直线运动则 A．物体A可能不受地面支持力的作用 B．物体A可能受到三个 sketch template

如图所示在与水平地面成θ角的拉力F作用下质量为m的物块沿地面�右做匀速直线运动 1试求物体与地面间的�动�擦因数 2若把此力F 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04 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

如图所示用�轮组拉着重600N的物体A沿水平方�匀速移动40s内移动了8m拉力F所做的功为2400J．1画出A物体受到的所有的力的 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

如图所示用细绳将重球悬挂在光�墙壁上当绳子变长时 A．绳子的拉力变大B．绳子的拉力变小C．墙对球的弹力变小D．墙对球的弹力变小题目和 sketch template

如图所示用细绳的一端栓在物体上再将细线绕过项端高度为h的定�轮用大小和方�都不变的拉力F作用在绳的另一端．用力拉细线使质量为M的物体 sketch template

如图所示用�轮组拉着物体A是正方体铁块边长是30cm．当拉力F=70N时物体A恰好做匀速直线运动．动�轮重15N已知ρ铁=78× sketch template

百度教育 sketch template

如图所示用F=200牛的拉力拉着物体A以3米/秒的速度在水平地面上匀速前进则物体B的运动速度为66米/秒．若物体B与水平地面的�擦力大小为 sketch template

如图所示用三段轻绳子将重物悬挂在空中此时绳子OB保持水平绳子OA与竖直方�的夹角为30°1画出节点O的受力示意图2如果绳子OA sketch template

如图a所示物体原来静止在水平面上用一水平力F拉物体在F从0开始逐渐增大的过程中物体先静止后又做变加速运动其加速度a随外力F变化的 sketch template

如图所示用F=6N的水平�右的拉力匀速拉动物块A时物块B静止不动此时弹簧测力计示数为4N则物块B所受�擦力大小及方�为 A sketch template

如图所示用水平拉力F拉上表面粗糙程度各处相同的物体A使其在水平地面上匀速运动当物体B静止不动时与水平绳相连的弹簧测力计的示数不变．关于 sketch template

光�水平地面上叠放着两个物体A和B如图7所示．水平拉力F作用在物体B上使AB两物体从静止出�一起运动．经过时间t撤去拉力F再经过时间 sketch template

如图所示小宇同学用一个距离手3m高的定�轮拉住100N的物体他手拉绳子从�轮正下方沿水平方�移动4m如图所示若不计绳重和�擦他至�做 sketch template

如图所示用25N的拉力沿竖直方�匀速拉起重为4N的物体G物体升高lm所用的时间为4s绳子自重�轮与轴间�擦不计则A拉力做功的功率 sketch template

如图9所示在50N的水平拉力F作用下重800N的物体沿水平地面做匀速直线运动 物体与地面间�动�擦力为120N则�轮组的机械效率为 sketch template

如图所示用平行斜面�下的拉力F将一个物体沿斜面往下拉动拉力的大小等于�擦力则 A．物体做匀速运动 B．合力对物体所做的功等于零 C sketch template

如图所示重为80N的物体在大小为20N方�水平�右的拉力F1作用下在水平面上以2m/s速度做匀速直线运动．当撤去拉力F1物体静止后 sketch template

如图所示用两个�轮分别匀速提升AB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

15．如图所示物体A叠放在物体B上在拉力F的作用下物体A和B一起沿着水平地面作匀速直线运动下列关于物体A受力的示意图正确的是 A．B sketch template

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