如图所示用12n的拉力沿竖直方�匀速拉起重为2n的物体物体上升01m所用时间为4s．1此过程中拉力的功率为 W动�轮的机械效率为 Sketch Coloring Page

如图所示用12n的拉力沿竖直方�匀速拉起重为2n的物体物体上升01m所用时间为4s．1此过程中拉力的功率为 W动�轮的机械效率为 Template

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anonymous
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anonymous

anonymous
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anonymous

anonymous
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anonymous

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anonymous

anonymous
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sketch #1041 strawberries

anonymous

anonymous
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anonymous

anonymous
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anonymous
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anonymous

anonymous
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anonymous
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anonymous
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anonymous

anonymous
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anonymous

anonymous
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tomski如图所示用12n的拉力沿竖直方�匀速拉起重为2n的物体物体上升01m所用时间为4s．1此过程中拉力的功率为 w动�轮的机械效率为 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12甲所示完全相同的木块A和B叠放在水平桌面上在12N的水平拉力F1作用下 AB一起作匀速直线运动此时木块B所受的�擦力为 N 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

一轮复习：动态平衡问题解题技巧知乎 sketch template

如图所示A物体重40NB物体重12N．A物体在绳子水平拉力作用下沿水平桌面�右做匀速直线运动它受到桌面的�擦力为12N．如果要使A物体 sketch template

力的合成中两类最小值问题知乎 sketch template

用如图甲所示的�轮组提升物体M，已知物体M所受的重力为550N，卷扬机加在绳子自由端的拉力F将物体M在20s内沿竖直方�匀速提升10m，拉力F sketch template

如图所示每个�轮均重12N用�轮组拉着重600N的物体A沿水平方�匀速移动在40s内物体移动了8m拉力F做的功为1280J．不计绳重 sketch template

16．如图所示左边是探究某根弹簧的伸长量x与所受拉力F之间关系的实验图根据实验数据得到右边图线 �写出图线代表的函数 X用m做单位 sketch template

如图所示质量为m的小球被水平绳AO和与竖直方�成θ角的轻弹簧系着处于静止状态现用火将绳AO烧断在绳AO烧断的瞬间下列说法正确的是 sketch template

一个物体在竖直�上的12N的拉力作用下以2m/s2的加速度�上作匀加速直线运动如要使加速度增加为4m/s2空气阻力不计此竖直拉力的大小 sketch template

如图所示质量为m的小球用长L的细线悬挂而静止在竖直位置在下列三种情况下分别用水平拉力F将小球拉到细线与竖直方�成θ角的位置．在此过程中 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=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物体重为G=100 N与斜面间的动�擦因数为μ=02用平行于斜面�上的拉力F拉物体使物体沿斜面匀速�上运动拉力F的大小为 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斜面长1m高04m用大小为5N沿斜面�上的拉力F将重10N的铁块从底端匀速拉到顶端斜面的机械效率为 若仅使倾角θ逐渐增大 sketch template

如图所示用竖直�上的力匀速拉动较长的杠杆使重为18 N的物体缓慢升高01 M拉力大小F=8 N拉力移动的距离为025 M．拉力所做 sketch template

一轮复习：动态平衡问题解题技巧知乎 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甲所示完全相同的木块A和B叠放在水平桌面上在水平拉力F1作用下A．B一起作匀速直线运动若将A．B紧靠着放在水平桌面上用水平力F2 sketch template

如图所示某人以平行斜面�下的拉力F将物体沿固定斜面拉下拉力大小等于�擦力则下列说法中正确的是 A．物体的机械能不变 B．合外力对物体做功 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

如图所示将一质量为m的�球用长为L的细绳吊起上端固定使�球在水平面内做匀速圆�运动细绳就会沿圆锥面旋转这样就构成了一个圆锥�绳与与 sketch template

如图所示用两个�轮分别匀速提升AB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

如图所示水平面上叠放着两个物体A和BmA=2kgmB=3kg两物体在10N的水平拉力作用下一起做匀速直线运动则A和B之间的�擦力大小 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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质量为m的物体在沿斜面�上的拉力F作用下沿放在水平地面上的质量为M的倾角为粗糙斜面匀速下�此过程中斜面保持静止则地面对斜面 A 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

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AB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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倾角为α的斜面体放在粗糙的水平面上质量为m的物体A与一劲度系数为k的轻弹簧相连现用拉力F沿斜面�上拉弹簧使物体A在光�斜面上 sketch template

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