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[問題] electromagnetic force

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electromagnetic force

why are friction and tension examples of electromagnetic force?
   

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考慮物體微量變形

但friction 的成因好似未完全確定
路曼曼其脩遠兮 吾將上下而求索

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我最近買左本工程力學嘅摩擦學黎睇
成因係不明
有好多理論但無一個係the best to explain the friction

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Are you sure friction and tension are examples of electromagnetic force?
i have never heard that. if it is true, i also want to know more.

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tension就一定係
原子間靠原子之間嘅分子力attract,當拉遠左之後,會attract,
拉得太近會repel

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Friction is also a kind of EM force. As among the 2 contact surface there will be repulsion between the electrons from both sides of the molecules that acts backward and so resulting in friction. Said so by Ken Chan during lesson. Not sure if the info is true or not cause I can find no references on his explanation on friction.

[ 本帖最後由 Omaru 於 2012-5-7 11:07 PM 編輯 ]
Live as if you were to die tomorrow.
Learn as if you were to live forever.

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