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6#
發表於 2005-4-5 12:33 AM
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i believe that can be easily explained by newton first law.( V( z- `9 o: B+ h/ b( a, x: U% `
When no net force act on a object, the object will travel with constant velocity.. e+ H B6 m% M9 k
' |0 G9 W. O: f% ?- H
0 m S3 ~0 c4 U* kSince the water on the earth will be attracted by gravitational force, it will fell on the ground.
- r4 x0 p' A) |( y- d2 U* ?1 \7 c! m1 U, m+ m' c
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) |
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