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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.. c' v; i/ O) c, T- T" a- r5 E
When no net force act on a object, the object will travel with constant velocity.
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3 g) C8 O9 {1 Q6 d0 u9 S& {$ U* h- c& w& y
Since the water on the earth will be attracted by gravitational force, it will fell on the ground.5 P0 R0 }5 L9 W6 _3 N7 G
8 U% r, `3 A; S! 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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