寫出兩種減少摩擦力的方法。
physics~~~~~~~~~
2009-08-11 7:12 am
回答 (2)
2009-08-12 5:24 am
✔ 最佳答案
I presume you are asking for reduction of friction between an object on a surface, not fluid resistance like air/water resistance.1. Use lubricant (潤滑劑).
2. place ball bearings or rollers between the object and surface.
3. Polishing the surface.
2009-08-11 9:47 am
1.令兩者之間的距離增加。
2.令物體表面變的平滑。
2.令物體表面變的平滑。
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