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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.
# q) m- ^% G, p4 g' h2 V; NWhen no net force act on a object, the object will travel with constant velocity." |4 o1 R0 o) t+ w; U; v
( R: K- J; y& K' V t' [: Q$ J5 [
8 b4 g1 H& T# f" ~Since the water on the earth will be attracted by gravitational force, it will fell on the ground.
! N2 x% x" S) g+ L% \) c, C2 `0 b: ?0 ? {+ e, z' r( A* I
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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