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範例:重量與高度

一火箭自地面垂直升空，當其質量剩為出發時的1/3時，其重量為出發時的1/27,則此時火箭離地面的高度為地球半徑的(A)1 (B)2 (C)3 (D)4 倍。[87前中]

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Posted in 萬有引力定律.

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By admin – 2009 年 03 月 06 日

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