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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." k& `, k) g) N& B# ]+ h
When no net force act on a object, the object will travel with constant velocity.( T; j: z @0 f- g4 y2 G
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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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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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