Questions
A river 10 m deep is flowing at 5 m/s. If coefficient of viscosity of water is , find the sear force exerted by water on of river bed.
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Correct option is A
Average velocity gradient dVdh=510=12S−1∴ Shear force =ηdVdh=10−3×12 Nm2=5×10−4 Nm2Similar Questions
The coefficient of viscosity of a liquid can be defined from the equation where F is the tangential force between two liquid layers of area A. The layers are at a distance dy apart and du is the difference in their velocities.
Suitable unit for dv/dx is:
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