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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.% N2 A z V( e1 M* q2 [- p
When no net force act on a object, the object will travel with constant velocity.3 d; ~# B0 \' ]! A+ l7 E
# M9 V( k) z) i1 h6 F' }
X4 e9 O' s! rSince the water on the earth will be attracted by gravitational force, it will fell on the ground.
3 _8 a/ `& F4 ^2 K& \% Y ?; K# F. u& I S; V. u. \; O2 c5 n! T
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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