MCAT Question of the Day
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    Q:

    		 For a bicycle traveling in the rightward direction along the x-axis on a surface where frictional forces are significant:
    		 

    A

    		 both static and kinetic friction are zero.

    B

    		 there is no static friction.

    C

    		 static and kinetic friction vectors are both positive and in the same direction.

    D

    		 static and kinetic friction vectors are both positive and in opposite directions.



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