已獲得補償摩擦軌道
係點解架???
急用,,有10點(((已獲得補償摩擦軌道)))
2007-03-04 3:37 am
回答 (2)
2007-03-04 3:47 am
The inclination of the track provides a wieght compoent that just balances the friction of the track. Thus a trolley that run on it would behave as if it is run on a smooth (i.e. frictionless) track.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070303000051KK04223