if you drop a iron ball and a wooden ball of the same size,

if you drop a iron ball and a wooden ball of the same size,

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送交者: steven 于 2008-02-21, 13:18:54:

回答: 你是说空气阻力吗？10米掉下来能有多少区别？我认为微乎其微。由 Enlighten 于 2008-02-21, 12:11:14:

you will see the difference. However, I doubted if it makes much difference between human.

是有区别，但从10米的高度掉下来，肉眼能看清这个区别吗？ (无内容) - smileykingkong (0 bytes) 2008-02-21, 13:50:56 (207208)
- yes. An even simpler test, rolling two soda cans, one is filled - steven (79 bytes) 2008-02-21, 13:56:26 (207209)
  - 这不一样你的这两个质量跟人体相比都太轻了，收阻力的影响大得多 (无内容) - smileykingkong (0 bytes) 2008-02-21, 14:05:40 (207211)
    - I thought you meant those balls. (无内容) - steven (0 bytes) 2008-02-21, 15:56:08 (207263)
    - 主要是要控制水花! (无内容) - JJZ (0 bytes) 2008-02-21, 14:41:16 (207223)