A viscous liquid is flowing through a straight tube under the action of a pressure difference across the ends of the tube. The tube is aligned with the \(x\)-axis. The force exerted on the tube by the liquid has the form:
\((a,b>0)\)
1. \(a\hat i\) 2. \(-a\hat i\)
3. \(a\hat i+b\hat j\) 4. \(-a\hat i+b\hat j\)
Subtopic:  Viscosity |
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A viscous liquid flows slowly through a pipe of cross-sectional radius \(R.\) The speed of the particles is a function of the distance from the axis of the pipe.
                     
Assume that the flow is smooth. The variation of \(v\) vs \(r\) is best given by the graph:
1. 2.
3. 4.
Subtopic:  Viscosity |
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From NCERT
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