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範例:自由落體與相對運動

氣球以等速上升，在某一高度時自氣球上自由落下一石子，若經10秒後石子落地，則石子著地時氣球的高度為若干?(取重力加速度g=10 m/s2) (A)320 (B)500 (C)720 (D)800 (E)1000 公尺。[前鎮高中]

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By 張慶堂 – 2016 年 09 月 13 日

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