The flow of water in a river at the banks is slower than at the middle of the river. Explain.
(N/A) The flow of water in a river is governed by the property of viscosity.
$1$. Near the banks,the water molecules experience adhesive forces between the water and the solid surface of the river bank.
$2$. These adhesive forces create a resistive force (viscous drag) that opposes the motion of the water,causing the velocity to decrease significantly near the banks.
$3$. In the middle of the river,the water molecules are far from the banks,so the effect of adhesive forces is minimal.
$4$. Consequently,the velocity of the water flow is higher in the middle compared to the banks.
$1$. Near the banks,the water molecules experience adhesive forces between the water and the solid surface of the river bank.
$2$. These adhesive forces create a resistive force (viscous drag) that opposes the motion of the water,causing the velocity to decrease significantly near the banks.
$3$. In the middle of the river,the water molecules are far from the banks,so the effect of adhesive forces is minimal.
$4$. Consequently,the velocity of the water flow is higher in the middle compared to the banks.
Explore More
Similar Questions
$A$ good lubricant should have
Easy
View SolutionViscous drag force depends on ...........
Easy
View Solution$A$ thin plate is placed between two fixed plates,separating two liquids with coefficients of viscosity $\eta$ and $4\eta$,as shown in the figure. If the plate is to be pulled by applying the minimum force,then the ratio $\frac{d_2}{d_1}$ is:
Water is flowing steadily in a river. $A$ and $B$ are two layers of water at heights $40 \ cm$ and $90 \ cm$ from the bottom. The velocity of layer $A$ is $12 \ cm/s$. If the velocity of the water at the bottom is $0$,what is the velocity of layer $B$ (in $cm/s$)?
$A$ metal cube of side $10 \,cm$ rests on a film of a liquid of thickness $0.2 \,mm$. If upon applying a horizontal force $\overrightarrow{F}$ of magnitude $0.1 \,N$ the cube slides with a constant speed of $0.08 \,m/s$, then the coefficient of viscosity is
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo