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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.
$ ]7 _: P. }8 L# ]( z5 G* IWhen no net force act on a object, the object will travel with constant velocity.! r% w% E. N: Z
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/ [0 V- s7 w2 G/ ~3 h7 X+ eSince the water on the earth will be attracted by gravitational force, it will fell on the ground.
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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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