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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.3 v8 A$ {( z! O/ F, { Z
When no net force act on a object, the object will travel with constant velocity.
4 i9 m$ k% b2 P4 u% q( h7 o8 ^7 E$ ~# j
# b3 L3 ~* B9 ~- \8 e+ R
4 V( u) u# W1 \" {Since the water on the earth will be attracted by gravitational force, it will fell on the ground.
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6 y2 y W) i4 WBut 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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