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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.1 l& D Y) F, A
When no net force act on a object, the object will travel with constant velocity.
( L$ Z& l0 b) w8 h/ [+ ~$ C4 t" r* }- Q4 N: l: v
6 d0 r/ h) f; k; b2 Z* jSince the water on the earth will be attracted by gravitational force, it will fell on the ground.
! G8 r$ Z' M9 \3 j. ~* z% c
+ |7 w g5 Q" N- e, I6 cBut 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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