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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.4 V: X. z2 r- `. J" Y$ h
When no net force act on a object, the object will travel with constant velocity.
8 U5 W0 H2 d. S# r, C, P/ H: o2 Y# ?5 w- j7 u
/ W: d3 G1 Y k ^: ~Since the water on the earth will be attracted by gravitational force, it will fell on the ground.3 G* ]) K: W1 R! }0 R
1 R4 _5 O% n3 y' oBut 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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