[閒聊] 不停翻滾的包裹
最近在網路上看到一支有趣的短片
http://www.youtube.com/watch?v=9Nv28lunRSY
影片中是一個在輸送帶上翻滾的包裹
有趣的是,他竟然在同一個高度足足翻滾3分鐘以上
你會怎麼用物理來解釋這個現象呢?@@"
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