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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.
8 e# k% T T! x9 M2 AWhen no net force act on a object, the object will travel with constant velocity.& ~2 ]: B: D; `: k0 o
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4 B0 s5 c; I( d1 KSince the water on the earth will be attracted by gravitational force, it will fell on the ground.5 h2 W7 m' E9 D' y, Y7 O
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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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