Home
Class 12
PHYSICS
The velocity of water in a river is 18km...

The velocity of water in a river is `18kmh^-1` near the surface. If the river is 5 m deep, find the shearing stress between the horizontal layers of water. The coefficient of viscosity of water `=10^-2 poise.`

A

`10^(-1) Nm^(-2)`

B

`10^(-2) Nm^(-2)`

C

`10^(-3) Nm^(-2)`

D

`10^(-4) Nm^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

The velocity of water in a rier is 18kmh^-1 near the surface. If the river is 5 m deepm, find the shearing stress between the horizontal lyers of water. The coefficient of viscosity of water =10^-2 poise.

The velocity of water in river is 180 km h^(-1) near the surface .If the river is 5 m deep,then the shearing stress between the surface layer and the bottom layer is ( coefficient of viscosity of water eta =10^(-3) Pa s)

A river 10 m deep is flowing at 5ms^(-1) . The shearing stress between the horizontal layers of the river is ( eta=10^-(3) SI units)

A river 10 m deep is flowing at 5ms^(-1) . The shearing stress between horizontal layers of the rivers is ( eta=10^-(3) SI units)

A large wooden plate of area 10m^2 floating on the surface of river is made to move horizontally wilth a speed of 2ms^-1 by applying a tangential force. If the river is 1m deep and the water contact with the bed is stationary, find the tangential force needed to keep the plate moving. Coefficient of viscosity of water at the temperature of the river =10^-2 poise.

A large wooden plate of area 10m^2 floating on the surface of river is made to move horizontally wilth a speed of 2ms^-1 by applying a tangential force. If the river is 1m deep and the water contact with the bed is stationary, find the tangential force needed to keep the plate moving. Coefficient of viscosity of water at the temperature of the river =10^-2 poise.

A large wooden plate of area 10m^2 floating on the surface of river is made to move horizontally with a speed of 2ms^-1 by applying a tangential force. If the river is 1m deep and the water in contact with the bed is stationary, find the tangential force needed to keep the plate moving. Coefficient of viscosity of water at the temperature of the river =10^-2 poise.

When a liquid flows in a tube, there is relative motion between adjacent layers of the liquid. This force is called the viscous force which tends to oppose the relative motion between the layers of the liquid. Newton was the first person to study the factors that govern the viscous force in a liquid. According to Newton’s law of viscous flow, the magnitude of the viscous force on a certain layer of a liquid is given by F = - eta A (dv)/(dx) where A is the area of the layer (dv)/(dx) is the velocity gradient at the layer and eta is the coefficient of viscosity of the liquid. A river is 5 m deep. The velocity of water on its surface is 2 ms^(-1) If the coefficient of viscosity of water is 10 ^(-3 ) Nsm ^(-2) , the viscous force per unit area is :

Water is flowing in a river at 2 ms^(-1) . The river is 50 m wide and has an average depth of 5 m . The power available from the current in the river is (Density of water = 1000 kg m^(3)

We know that when a boat travels in water, its net velocity w.r.t. ground is the vector sum of two velocities. First is the velocity of boat itself in river and other is the velocity of water w.r.t. ground. Mathematically: vecv_(boat) = vecv_(boat,water) + vecv_(water) . Now given that velocity of water w.r.t. ground in a river is u. Width of the river is d. A boat starting from rest aims perpendicular to the river with an acceleration of a = 5t, where t is time. The boat starts from point (1,0) of the coordinate system as shown in figure. Assume SI units. Find time taken by him to across the river.