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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.
; i$ ~8 m9 {7 _) j- k; S Q0 b0 mWhen no net force act on a object, the object will travel with constant velocity.. g* j, W+ o5 t
+ g6 p# _; z; @& z1 z
' Q8 W; n6 g0 |5 wSince the water on the earth will be attracted by gravitational force, it will fell on the ground.
( R! l! \2 u. D0 ~/ J
. [0 K) [7 ^& q2 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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