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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.( d" n& T$ W# G1 X) Y. s- _6 P
When no net force act on a object, the object will travel with constant velocity.% ~; Q+ R5 f) Y' }
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Since the water on the earth will be attracted by gravitational force, it will fell on the ground.
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( ^' g1 p& s* {9 ~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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