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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 A- T$ B$ x r( B& O( YWhen no net force act on a object, the object will travel with constant velocity.
' _, k" Y" m8 q+ e2 h4 X5 _# b7 O5 d7 V& C. g9 ]. K6 |5 \
0 [3 M) o- h) s" l3 \5 JSince the water on the earth will be attracted by gravitational force, it will fell on the ground.3 k1 ]7 X ?( q% ~) F. Z1 ?
8 Q/ y2 k) ~& S
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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