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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anonymous

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Marlyn Ortiz
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sketch #5169 Iron Man by Hannah Kellogg

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Amer Amimer
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anonymous
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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

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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

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

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

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

力的合成中两类最小值问题知乎 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

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

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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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

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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

如图所示的物体A静止在斜面上请画出物体A所受重力的示意图画出图乙中细线对木块A拉力的示意图．题目和参考答案——青夏教育精英家教�—— sketch template

如图所示重500N的物体在100N的水平拉力作用下沿水平地面以05m/s的速度匀速运动10s．在这个过程中拉力做功的功率是 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一动�轮拉一物体A以05m/s的速度 在水平面上作匀速直线运动物体A重为20N受到的� 擦阻力是物重的02倍水平拉力为2 sketch template

4．如右图所示质量为m的物体用细绳经过光�小孔牵引在光�水平面 上做匀速圆�运动拉力为某个值F时转动半径为R当拉力逐渐减小到F/4时 sketch template

如图所示水平地面上的物体A在斜�上的拉力F的作用下�右做匀速直线运动则关于下列物体受力情况的说法中正确的是 A．物体A可能只受到二个 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

如图所示用F为30N的拉力通过�轮组拉着重为300N的物体在水平面上以05m/s的速度�左做匀速直线运动．则物体受到的�擦力大小为 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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用细绳系着一个小球使小球在水平面内做匀速圆�运动不计空气阻力关于小球受力说法正确的是A．只受重力 B．只受拉力C．受重力拉力 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恒力F拉一个质量为m 的物体由静止开始在水平地面沿直线运动的位移为s力F与物体运动方�的夹角为α已知物体与地面的动�擦因数为 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

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细线吊着一个质量为m的小球使小球在水平面内做圆锥�运动关于小球受力正确的是 A．受重力拉力�心力B．受重力拉力C sketch template

7．如图甲所示用 水平外力F拉着一个静止在倾角为的光�斜面上的物体逐渐增大F物体做变加速运动其加速度随外力F变化的图像如图乙所示重力 sketch template

如图所示物体A通过�轮在水平拉力F的作用下沿水平面以1m/s 的速度做匀速直线运动此时弹簧测力计的示数为4N若不计动�轮绳子弹簧测力 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

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