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通過畫圖可以看出,把滑輪直徑看成是個杠杆,一端可以看成是支點,中心位置是阻力作用點,另一端看成是動力作用點,這樣的話動力臂是阻力臂的兩倍,所以省力
筷子,剪刀,凉衣服棍子,鏟子,炒菜鍋得把等等跟棍子有關的都是杠杆原理
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