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杨柳吐绿,繁华似锦的季节,微风拂面,春意盎然的日子,牵一线风筝,放飞春天的喜悦,有诗曰:草长莺飞二月天,拂堤杨柳醉春烟,几童散学归来早,忙趁东风放纸鸢。 PowerPoint PPT Presentation


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杨柳吐绿,繁华似锦的季节,微风拂面,春意盎然的日子,牵一线风筝,放飞春天的喜悦,有诗曰:草长莺飞二月天,拂堤杨柳醉春烟,几童散学归来早,忙趁东风放纸鸢。 通过风筝线的调节可以保持风筝面的角度,当风吹在风筝面上时,它们之间产生水平方向的相互作用力。. 那么,水平的风力是怎样使风筝飞的越来越高的?. 一、力的分解. 拖拉机拉耙的力 F ,同时产生两个效果:. (1) 使耙克服水平阻力前进 (2) 把耙上提。. 力 F 可以用两个力 F 1 和 F 2 同时作用来代替, 而效果相同。. F. F. 2. F. 1. 1. 力的分解:求一个力的分力叫做力的分解。.

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杨柳吐绿,繁华似锦的季节,微风拂面,春意盎然的日子,牵一线风筝,放飞春天的喜悦,有诗曰:草长莺飞二月天,拂堤杨柳醉春烟,几童散学归来早,忙趁东风放纸鸢。

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