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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.7 U4 u9 n* ]% A& p; B. x# V1 v
When no net force act on a object, the object will travel with constant velocity.
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9 ~1 K7 {/ Q6 h3 e! E3 }- F$ d
6 X8 j" O% g/ @ C9 |' _% ]8 zSince the water on the earth will be attracted by gravitational force, it will fell on the ground.
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( ^. N2 @9 H) K3 \$ t4 QBut 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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