- 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.# M9 g8 W- b7 h8 W8 P, i
When no net force act on a object, the object will travel with constant velocity.: U( M9 o' w5 w1 G1 q. B6 ^/ Q3 H
8 T& \- ]) W4 Y0 Y. R1 V. U3 w- x
- z, N8 l) Q" I% ?9 YSince the water on the earth will be attracted by gravitational force, it will fell on the ground.3 S) q- Y0 V4 j3 X0 j. x
9 Q, t/ D! V5 `3 |) ZBut 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) |
|