Q.

Which one of the follflowing is correct?

A. the frictional resistance depends on the nature of the surface area of contact
B. the frictional resistance is independent of the nature of the surface area of contact
C. the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flows
D. the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flows View Answer
Answer» D. the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flows View Answer
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