 
- 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.( `/ d8 p- F+ F
When no net force act on a object, the object will travel with constant velocity., `8 r* C+ q2 o2 z6 u
0 r/ z+ P! r Y% t5 X) Y
8 w& D0 ^1 z) A$ H6 e, K
Since the water on the earth will be attracted by gravitational force, it will fell on the ground.
0 {3 z3 U* o. h. a b# h5 V$ S! ] p7 P7 t# u# ~5 M7 X8 \, z5 N
But 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) |
|