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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.
; p- q# v& e. j! MWhen no net force act on a object, the object will travel with constant velocity.& S8 L: V: v1 H) h' s: v# E2 {
& n3 }, ~( d+ g2 z
( ^: t+ i( u+ p4 t8 T' _, w
Since the water on the earth will be attracted by gravitational force, it will fell on the ground.% e+ N! \, G4 G3 C5 l4 b
+ ~5 P% t- [3 [' w' EBut 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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