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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.# R2 L+ N& a6 ^* ?+ o+ g! ^: h/ I
When no net force act on a object, the object will travel with constant velocity.
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% }) F" U0 a% B8 f: f8 v4 v+ |' Z8 HSince the water on the earth will be attracted by gravitational force, it will fell on the ground.
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+ C! ?$ t: v3 O( Z1 P% [9 V. GBut 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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