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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.
& {) d/ v# u0 x) w1 bWhen no net force act on a object, the object will travel with constant velocity.% g8 X/ V# l; b7 c7 M. B
% Y( A1 a. x$ D* y% U5 m9 l3 N% C2 ~6 s2 M9 M3 D. m+ ^/ v
Since the water on the earth will be attracted by gravitational force, it will fell on the ground.9 H' A) i$ e1 e2 N8 `
. F) U6 C6 E4 ?7 _- u
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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