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## Homework Statement

My main problem here is that I do not understand what they are asking. What is the

*wall shear stress*? Do they mean the stress at the "floor" (or whatever you want to call it)?

If so, I am assuming I use Newton's Law of Viscosity [itex]\tau=\mu\frac{du}{dy}[/itex] since this is 1-dimensional flow.

Would the

*wall shear stress*[itex]\tau_w[/itex] be given by

[tex]\tau_w=\int_{y=0}^\delta \tau(y)\, dy[/tex]

and then the problem reduces to finding an expression for [itex]\tau(y)[/itex]

Or am I way off here? thanks