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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.
9 A) }4 E+ n4 g9 h% X( PWhen no net force act on a object, the object will travel with constant velocity./ T# \4 J5 M* a) ^" A3 g1 _
/ d5 y" j) A" e/ _5 W5 ^& L& U
* h, C8 q8 D' H3 G) D1 h* FSince the water on the earth will be attracted by gravitational force, it will fell on the ground.
% L0 x$ S4 f( _, p' T# ?
$ P: b$ K$ F/ N- `0 B) I% LBut 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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