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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.
; L% Z; y4 C' vWhen no net force act on a object, the object will travel with constant velocity., c3 `# L4 _0 H
$ o+ B4 U* g9 D
* x2 m# Y2 ? v U/ K, F# ?7 W7 wSince the water on the earth will be attracted by gravitational force, it will fell on the ground.2 I9 P- s) z5 e, i) B8 m1 e
( ~8 D8 F+ e4 cBut 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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