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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.
( j( Y# i% e3 M0 M' FWhen no net force act on a object, the object will travel with constant velocity.
; R2 }$ p% E/ Y* Y/ @$ w4 S: i" h: r2 N1 H# S6 c
4 X5 m& D% L m1 D/ V3 s& ySince the water on the earth will be attracted by gravitational force, it will fell on the ground.1 J/ s1 ~4 \6 P
5 X3 L9 {4 Y r& y
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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