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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.
$ x2 n# u5 G. u {When no net force act on a object, the object will travel with constant velocity.$ R2 g) H h0 ^8 }
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& G E& H" r( ^6 [7 H3 n9 a' N* T- {Since the water on the earth will be attracted by gravitational force, it will fell on the ground.
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( \% F6 U) ~; T+ S9 F' rBut 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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