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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.
8 h" v3 X7 R0 \+ m8 F- K- n) u0 @/ FWhen no net force act on a object, the object will travel with constant velocity.
% @9 {1 o5 u5 ^' x) a. L( \2 E$ m% z6 h* @- Q+ |2 n: [* p2 `2 u
5 X" e- u9 z# l# Y b6 TSince the water on the earth will be attracted by gravitational force, it will fell on the ground.: g* F5 x& V9 E7 S: t! V
% x' z% i2 s; B1 R
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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