Class 11 Physics Mechanics Mechanical Properties of Fluids

If the velocity of water near the surface of a $6$m deep river is $6$ m$/$s, assuming uniform velocity gradient along the depth, find the shear stress between the horizontal layers of water (coefficient of viscosity of water $=10_{−2}$ poise).

Solution: Shear stress = $−μdydu $

= $10_{−2}×66 $

= $−10_{−2}sec.poise $

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