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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.
9 {1 W( @; U$ q4 f5 zWhen no net force act on a object, the object will travel with constant velocity.2 @+ Y' U9 a! O
3 ~9 `' m( Y. p& \0 N' ^# L" X( I3 i! N5 I5 d f
Since the water on the earth will be attracted by gravitational force, it will fell on the ground.) O! N7 i5 c; H- v$ ]
% G1 t. n& I9 e; n! hBut 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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