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Shear Stress Sample Assignment

Question: The velocity distribution of a viscous liquid (dynamic viscosity m = 0.9 Ns/m²) flowing over a fixed plate is given by u = 0.68y - y² (u is velocity in m/s and y is the distance from the plate in m). What are the shear stresses at the plate surface and at y=0.34m?

Ans:

 

At the plate face y = 0m,

Calculate the shear stress at the plate face

At y = 0.34m,

As the velocity gradient is zero at y=0.34 then the shear stress must also be zero.

Other Sample Assignments in Physics Homework Assignment :

Work Energy Power	Minimum Pulling Force
Shear Stress	Loss in Kinetic Energy
Impulse

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