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  5. 施力要怎麼算，轉幾圈要怎麼算
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Junior High
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施力要怎麼算，轉幾圈要怎麼算

9. 如右圖螺旋 d=3.14cm,機長(=0.5m,(A)若要將 1000kgw 的物體抬高則 需施力為【18】 kg (B)承(A)若要將物體抬高 62.8cm,則需要 轉動桿臂【719 圈(C)承(B)物體獲得重力位能【20 焦耳 04 10将AR 夾膠迪学七人。 會妆品 韓國演人物问 。 400
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