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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. F4 K5 w# u+ k* ` ?9 h
When no net force act on a object, the object will travel with constant velocity.
" m$ O+ [# y. M/ V# R+ ?1 E) y9 O! H t3 x$ ~6 s; y( Y+ a
% A2 k& K6 A g! T- S" p
Since the water on the earth will be attracted by gravitational force, it will fell on the ground.& C3 S) S$ J( F0 K+ n, T
1 t# q+ M! N) R) l2 T5 v" h$ K b9 A
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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