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ربا محمد حسن محمد ابراهيم Sat 20 Mar 2010, 7:29 amFriction Applications
When an object moves so fast in the air (such as rockets or trans),the frictions force between this object and air increases,since the area of the surface exposed to the air is large.
When an object moves so fast in the air (such as rockets or trans),the frictions force between this object and air increases,since the area of the surface exposed to the air is large.
