question_answer

The coefficient of friction \[f\] in terms of shear stress \[{{\tau }_{0}}\] is given by:

A) \[f=\frac{\rho {{v}^{2}}}{2{{\tau }_{0}}}\]                

B) \[f=\frac{{{\tau }_{0}}}{\rho {{v}^{2}}}\]

C) \[f=\frac{2{{\tau }_{0}}}{\rho {{v}^{2}}}\]                

D) \[\frac{2\rho {{v}_{0}}}{{{\tau }_{0}}}\]