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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.5 Y) x( u6 [ E* l
When no net force act on a object, the object will travel with constant velocity." U* `: V" L; ^, r5 l4 c( L! d
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' X+ s& G( @! I8 o+ q9 Q0 wSince the water on the earth will be attracted by gravitational force, it will fell on the ground.
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9 f: p% f! v9 G' a" E; Q, x( R2 X aBut 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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