 
- 帖子
- 118
- 精華
- 0
- 威望
- 69
- 魅力
- 0
- 讚好
- 0
- 性別
- 男
|
6#
發表於 2005-4-5 12:33 AM
| 只看該作者
i believe that can be easily explained by newton first law.% t' L: a* F! i& P
When no net force act on a object, the object will travel with constant velocity.' D1 A& z9 D x. h! e
' V$ f. L/ \( ^( _7 E
* q2 ?& ?' x+ {& U3 {( C2 f, R) l) y+ BSince the water on the earth will be attracted by gravitational force, it will fell on the ground.
, ]7 C6 i+ [, G8 l( [! i. c
( Z; o; W9 v$ k; W: R' W+ Z7 eBut in the space, no force is added on the water will u X the ball ,so the water will remain its old velocity(don't move) |
|