尤如自由落體,物體下落速度與物體質量無關。
如不計摩擦力,從同一高度的斜麵上滾下來,僅是勢能轉換成動能,同時滾到下麵。
所有跟帖:
• 冰最快,沒內耗..... -jinjing- ♀ (0 bytes) () 11/29/2011 postreply 08:32:13
• 冰最快,沒內耗..... -jinjing- ♀ (0 bytes) () 11/29/2011 postreply 08:32:13
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