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範例:上拋的自由落體

氣球以10m/s等速上升，當離地高240米時，自氣球上自由落下一石子，取g=10 m/s2，求(1)經多久石子著地?(2)石子著地時之速度為若干?(3)石子著地時氣球的高度為若干?

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By admin – 2010 年 08 月 09 日

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