[問題] 摩擦力
我翻開高中課本查到摩擦與接觸面不平整有關,有時候在接觸面沾水會
減少摩擦力,如機車在雨天行走較容易打滑;但數鈔票沾水好像是增加摩擦,
會比沒沾水要好數,有點納悶同樣是沾水,為什麼有時候是減少摩擦而有時候
是增加摩擦?
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有疑問的是說,人的手與鈔票不是理想光滑,所以水照理說應該減少摩擦才對,
但結果確是增加摩擦,這裡面不知道有什麼我沒注意到的觀念
※ 編輯: yjn145 來自: 61.231.12.129 (06/12 18:45)
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06/12 19:32, , 5F
06/12 19:32, 5F
手與鈔票有摩擦,應該不是相對光滑...況且加水為什麼不會變更光滑?
而是增加摩擦?
※ 編輯: yjn145 來自: 61.231.12.129 (06/12 20:11)
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