Originally posted by seafireson2 at 2006-5-8 10:24 PM:: |5 O* t  {: f- {  a6 A) V+ y
如果北極有個洞真穿南極, ( S0 D) h4 J8 f% t8 [
您跌入去,...

Originally posted by milk~~ at 2006-5-8 10:38 PM:
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simple harmonic motion

Originally posted by fung at 2006-5-8 11:22 PM:
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仲要with damping

Originally posted by gaye at 2006-5-8 11:35 PM:
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但假如我唔係 North Pole jump 落...

Originally posted by gaye at 2006-5-8 11:35 PM:
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但假如我唔係 North Pole jump 落...

Originally posted by spector.R at 2006-5-8 20:51:* s& D- V/ l/ i/ ?4 S5 r
忽然有個奇想...你地有冇諗過
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% q0 ~0 ~) H/ E假設...

Originally posted by 機密 at 2006-5-9 12:10 AM:" b; C9 _/ P* Q
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無乜可能，除了極熱之外，還要頂得住地心的高壓！ 未到對面你都變左屎餅啦！ 瓜！

Originally posted by gaye at 2006-5-8 11:35 PM:
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4 l+ N7 g  B6 }9 p! E; U( N' M但假如我唔係 North Pole jump 落...

Originally posted by 機密 at 2006-5-9 12:10 AM:
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) ]" s  I+ \" f1 p, ^/ X7 i無乜可能，除了極熱之外，還要頂得住地心的高壓！ 未到對面你都變左屎餅啦！ 瓜！

Originally posted by seafireson2 at 2006-5-9 00:15:
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9 X) n* _  g) \$ I都話明"假設"ar!!!!!!假設唔一定要正確ga.............

Originally posted by fung at 2006-5-9 12:03 AM:0 D4 S% l/ ]- @) \! }+ \
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咁我諗要睇你點define上同落
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Originally posted by spector.R at 2006-5-9 19:37:/ p2 g4 l1 k1 A  C
我諗要達成呢個創舉仲難過派人上火星....

Originally posted by 奇 at 2006-5-9 09:22 PM:6 z% A) Y" N, Q. L
我反而想知"下降"速度幾多?

Originally posted by FishyR at 2006-5-9 05:09 PM:
% p& r* g- B4 d我結論係去唔到最中心, 而喺地心同地面之間停下來. 喺個點係無地心吸力, 因地面質量對我所做成o既萬有引力, 同地心質量對我所做成o既萬有引力喺對等.