static friction VS kinetic friction

2006-12-12 7:29 am
本人實在不太明白它們之分別
首先點解braking ...
個tyre同road係static
而 braking pad 同metal disc又係kinetic friction
之後點解 brake太hard
個pad同disc又變左 static f
最後...sliding又會出現??

回答 (1)

2006-12-12 11:09 am
✔ 最佳答案
tyre同road係static friction 係因為佢地無relatively motion
e.g.個tyre同road接觸果點係靜止的

個pad同個disc係kinetic friction因為佢地都有relatively motion
e.g. 個disc都係轉緊的

如個press too hard,
disc會suddenly stopped, no more relatively motion
sliding出現因為due to inertia of the car


收錄日期: 2021-04-13 14:21:04
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