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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 C( J9 T, S0 G3 TWhen no net force act on a object, the object will travel with constant velocity.
+ D5 W2 u) T: w+ F- {/ w+ m' [
1 d0 \0 b( V8 P. l! g4 e/ ]. K7 D$ i- U0 h' N1 J' z9 P8 `
Since the water on the earth will be attracted by gravitational force, it will fell on the ground.
" `) T0 k- V$ N7 a
" G: M. G j4 C3 NBut 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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