图11所示，某人在筐内，人重400n，筐重90n，动�轮重20n。此人用动�轮将自己匀速拉起。不计�擦和绳重，求人对绳子拉力多大？人对筐底压力 Sketch Coloring Page

图11所示，某人在筐内，人重400n，筐重90n，动�轮重20n。此人用动�轮将自己匀速拉起。不计�擦和绳重，求人对绳子拉力多大？人对筐底压力 Template

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tomski图11所示，某人在筐内，人重400n，筐重90n，动�轮重20n。此人用动�轮将自己匀速拉起。不计�擦和绳重，求人对绳子拉力多大？人对筐底压力 coloring

图11所示，某人在筐内，人重400N，筐重90N，动�轮重20N。此人用动�轮将自己匀速拉起。不计�擦和绳重，求人对绳子拉力多大？人对筐底压力 sketch template

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40．如图19所示�属块的质量为60kg某人用�轮组将�属块从水中匀速提起�属块在水面下10s内上升了5m此时某人作用在绳自由端的拉力 sketch template

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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11所示用�轮组提升重为630 N的物体绳子自由端拉力F为300N重物以02m/s的速度匀速上升不计�擦和绳重求 1�轮 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

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如图所示某人用大小相同的力作用于弹簧观察比较两图可知力的作用效果与力的有关．题目和参考答案——青夏教育精英家教�—— sketch template

如图所示的是某人在1个标准大气压下一次�吸过程中肺内气压的变化曲线．据图和所学知识回答下列问题1曲线AB表示时肺内气压的变化．此时的 sketch template

某人利用如图所示的�轮组用250N的拉力在20s内将重为G=480N的物体匀速提高h=2m若不计�擦和绳重求1动�轮重2若再 sketch template

某人利用如图所示的�轮组将一重为400N的物体在10s内匀速提升2m人作用在绳子末端的拉力为250N．不计绳重及绳与�轮的�擦求1 sketch template

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