Ball bearings are used in bicycles and cores because- – McqOptions

MCQOPTIONS

1.	Ball bearings are used in bicycles and cores because-
A.	The effective area of contact between the wheel and axle is increased
B.	none of the above statements are correct
C.	The effective area of contact between the wheel and axle decreases
D.	The effective real area of contact between the wheel and axle is increased by
Answer» C. The effective area of contact between the wheel and axle decreases

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