2．如图所示在不计绳重和�擦的情况下用动�轮把重40n的物体匀速提高2m所用的拉力为25n则拉力做功是 J动�轮的机械效率是果把 Sketch Coloring Page

2．如图所示在不计绳重和�擦的情况下用动�轮把重40n的物体匀速提高2m所用的拉力为25n则拉力做功是 J动�轮的机械效率是果把 Template

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sketch #378 Guess what flag?
ɔılqndǝɹ ɥɔǝzϽ

anonymous

anonymous
sketch #378 Guess what flag? ɔılqndǝɹ ɥɔǝzϽ

sketch #819

Laura Agapi Asnicar
sketch #819

sketch #2483 Una Catrina by sketchmaster

sketchmaster
sketch #2483 Una Catrina by sketchmaster

sketch #521 A hungry caterpillar

Tom Kelly
sketch #521 A hungry caterpillar

sketch #3753

anonymous

anonymous
sketch #3753

sketch #21085 Tobirama by Enrique L. Manly

anonymous

anonymous
sketch #21085 Tobirama by Enrique L. Manly

sketch #1328

anonymous

anonymous
sketch #1328

sketch #4555 Mario by Alexander Volodimirovich Danilchenko

anonymous

anonymous
sketch #4555 Mario by Alexander Volodimirovich Danilchenko

sketch #1703

Laura Agapi Asnicar
sketch #1703

sketch #778

Benjo Arellano
sketch #778

sketch #20840 Dog by Laur Ūūtiis

anonymous

anonymous
sketch #20840 Dog by Laur Ūūtiis

sketch #3676 Sceptical horse by Koes Maung

anonymous

anonymous
sketch #3676 Sceptical horse by Koes Maung

sketch #2926 Power Puff Girls by Sylvie Rieux

anonymous

anonymous
sketch #2926 Power Puff Girls by Sylvie Rieux

sketch #3599 Lovely pencil face

anonymous

anonymous
sketch #3599 Lovely pencil face

sketch #5192

anonymous

anonymous
sketch #5192

sketch #3157 umpa lumpa

anonymous

anonymous
sketch #3157 umpa lumpa

sketch #2616 Green Day by sketchmaster

sketchmaster
sketch #2616 Green Day by sketchmaster

sketch #2691

Gaurav Patel
sketch #2691

sketch #846 cat fridayz z z zzzz zz

anonymous

anonymous
sketch #846 cat fridayz z z zzzz zz

sketch #828 Were Fools

anonymous

anonymous
sketch #828 Were Fools

sketch #4698

anonymous

anonymous
sketch #4698

sketch #1453

anonymous

anonymous
sketch #1453

sketch #4405 Cat by Nizamuddin Shuja

anonymous

anonymous
sketch #4405 Cat by Nizamuddin Shuja

sketch #5269

anonymous

anonymous
sketch #5269

sketch #3145 Madoka by Николай Герасимов

anonymous

anonymous
sketch #3145 Madoka by Николай Герасимов

sketch #1451 mi6softlab vibra

anonymous

anonymous
sketch #1451 mi6softlab vibra

sketch #4313

anonymous

anonymous
sketch #4313

sketch #3036 Wiz Khalifa by Malyi Link

anonymous

anonymous
sketch #3036 Wiz Khalifa by Malyi Link

sketch #2640 Marge by Mirnes Sinanovic

Mirnes Sinanovic
sketch #2640 Marge by Mirnes Sinanovic

sketch #4566 Edward Scissorhands by Angel Ördoñez

anonymous

anonymous
sketch #4566 Edward Scissorhands by Angel Ördoñez

tomski2．如图所示在不计绳重和�擦的情况下用动�轮把重40n的物体匀速提高2m所用的拉力为25n则拉力做功是 j动�轮的机械效率是果把 coloring

如图所示不计绳重和�擦沿三种不同的方�拉绳使物体匀速上升所用的力分别是F1F2F3则A．F1最大 B．F2最大 C．F3最大 D 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

题目如图所示利用�轮组在2s内将重400N的物体匀速提升了1m所用拉力F为150N．不计绳重和�擦下列说法正确的是A 绳子自由端 sketch template

10．用相同的定�轮和动�轮组成甲乙两个�轮组如图8所示用它们来提升同一重物甲�轮组将重物举高1m乙�轮组将重物举高2m在不计绳 sketch template

如图所示已知 G A＝ B＝120 N不计绳重和�擦当�轮重忽略不计时分别用力匀速提升物体 A和 B则 F N B sketch template

如图所示分别用两个�轮组在相同的时间内将重相同的物体G匀速提升相同的高度每个�轮的重均相同．不计绳重及�擦此过程中 A．甲的机械 sketch template

如图19所示�轮组不计绳重及�擦请同答以下问题 L在“测�轮组机械效率 的实验中应�上拉动弹簧测力计使重物上升一定高度 和 sketch template

在不计绳重和�擦的情况下利用如图所示的甲乙两装置分别用力把 相同的物体匀速提升相同的高度若用η甲η乙表示甲乙两装置的机械效率W甲W sketch template

利用如图所示的装置工人用力F把重为100N的物体以02m/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

如图所示，将两个完全相同的弹簧测力计的挂钩钩在一起，若A测力计示数为FA=200N；B测力计的示数FB=N，地面对左边同学的�擦力方��，地 sketch template

在不计绳重和�擦的情况下利用如图所示的甲乙两装置分别用力把 相同的物体匀速提升相同的高度若用η甲η乙表示甲乙两装置的机械效率W甲W sketch template

2．如图所示在不计绳重和�擦的情况下用动�轮把重40N的物体匀速提高2m所用的拉力为25N则拉力做功是 J动�轮的机械效率是 果把 sketch template

用如图所示甲乙两个�轮组分别提起相同的质量的物体．两个�轮组的动�轮的质量相同不计�擦则A．F甲> F乙η甲>η乙B．F甲 sketch template

如图所示在竖直�上大小为10N的力F的作用下重物A沿竖直方�匀速上升已知重物A上升速度为02m/s不计�轮重绳重及绳与�轮间的�擦 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

如图所示用两个完全相同的�轮匀速提升质量相等的物体且物体质量大于�轮质量不计绳重和�擦比较甲乙两种方式可知更省力 机械效率更高 sketch template

百度教育 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

如图所示绳OC与竖直方�成30°角 O为质量不计的�轮绳与�轮间�擦不计已知物B重1000N物A重400N物AB均静止求物B sketch template

如图所示的甲乙两个�轮组所用�轮都相同分别把同一重物匀速提升相同的高度．若不计绳重及�擦下列说法正确的是 A．F1=F2B．乙�轮 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

百度教育 sketch template

如图所示用�轮组提起一个密度为25×103kg/m3体积为004m3的石块作用在绳子自由端的拉力F为400N石块在20s内匀速上升 sketch template

题目如图所示高08m重1100N的均匀圆柱形木柱M底面半径r=03m将它竖直放在水平地面上时木柱所受的重力与地面对它的支持力 sketch template

如图甲所示，用刻度尺测量一物体的长度，物体的长度为cm；如图乙所示，图中是分度值为01s的机械秒表，其示数是s。 sketch template

如图所示绳OC与竖直方�成30°角 O为质量不计的�轮绳与�轮间�擦不计已知物B重1000N物A重400N物AB均静止求物B sketch template

用如图所示的甲乙两个�轮组分别将重物G1G2提高相同的高度已知每一个�轮的质量都相同不计绳重和�擦下列说法正确的是 A．若G1 sketch template

测定如图所示的�轮组的机械效率 1实验所需器材除钩码弹簧测力计�轮铁架台外还需要 和 2如果将两个1N的钩码匀速提升 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甲乙两个�轮组通过细绳悬挂在天花板上用�轮组匀速提升重为600N的物体时悬挂甲乙两�轮组的细绳所受的拉力分别为F甲F乙 sketch template

在弹簧测力计下挂一小电扇静止时测力计示数如图所示小电扇重为 N若让测力计挂着小电扇竖直匀速上升测力计示数将若让小电扇通电转动起来 sketch template

小李在“探究物质熔化规律”实验中，所用装置如图甲所示。�在安装器材时应按照选填（“从上到下”或“从下到上”）的顺序安装器材；�从图乙可知物质在 sketch template

如图所示用相同的�轮组成甲乙两个�轮组分别将同一物体在相同时间内匀速提升相同高度若不计绳重和�擦比较甲乙两�轮组下列说法正确的是 sketch template

如图所示利用定�轮动�轮及�轮组匀速�上提升重物已知作用在绳子自由端的拉力F 甲=F 乙=F 丙=50 N则1不计动�轮重和绳与 sketch template

在不计绳重和�擦的情况下利用相同器材组成如图所示的甲乙两装置分别用力把相同的物体匀速提升相同的高度若用η甲η乙表示甲乙两装置的机械 sketch template

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