Question:medium
Water is flowing on a horizontal fixed surface such that its flow velocity varies with y (vertical direction) as
v = k((2y²)/(a²) - (y³)/(a³)).
If coefficient of viscosity for water is η, what will be the shear stress between layers of water at y = a?
Water is flowing on a horizontal fixed surface such that its flow velocity varies with y (vertical direction) as
v = k((2y²)/(a²) - (y³)/(a³)).
If coefficient of viscosity for water is η, what will be the shear stress between layers of water at y = a?
Show Hint
Shear stress in fluids depends on velocity gradient, not velocity itself.
Updated On: Mar 20, 2026
- \( \dfrac{\eta k}{a} \)
- \( \dfrac{\eta}{ka} \)
- \( \dfrac{\eta a}{k} \)
- None of these
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The Correct Option is A
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