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範例:自由落體與反應時間[84推甄]

如右圖所示,小明手持米尺,使米尺下端零點位於小華拇指與食指之間。小華一看到小明鬆手,就立即抓握米尺,結果米尺落下20公分。若重力加速度為10米/秒2,則小華的反應時間約為多少秒? (A)0.02 (B)0.2 (C)2 (D)20。[84推薦甄選]

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Posted in 歷屆學測(推甄)考題, 物體運動的軌跡.

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By 張慶堂 – 2014 年 10 月 11 日

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