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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.: v+ h( r. {9 Z) u' k* k' }5 Z
When no net force act on a object, the object will travel with constant velocity.
, k- _1 T4 \! _ d- |4 S+ T& l& f! y: N# O2 @
# {4 J' ^# d z0 s: n$ G6 [$ r
Since the water on the earth will be attracted by gravitational force, it will fell on the ground.8 J7 } A$ k# ?* o
% J/ p K; a* c/ W K
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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