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Water in a river 20m deep is flowing at a speed of 10ms^{-1}.

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Water in a river $20 m$ deep is flowing at a speed of $10 m s^{- 1}$ . The shearing stress between the horizontal layers of water in the river in $N m^{- 2}$ is :(coefficient of viscosity of water $= 1 0^{- 3}$ SI units)

1 \times 1 0^{- 2}

0.5 \times 1 0^{- 2}

1 \times 1 0^{- 3}

0.5 \times 1 0^{- 3}

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Harper Discussed

Water in a river

20 m

deep is flowing at a speed of

10 m s^{- 1}

. The shearing stress between the horizontal layers of water in the river in

N m^{- 2}

is :(coefficient of viscosity of water

= 1 0^{- 3}

SI units)

7 mins ago

Discuss this question LIVE

7 mins ago

Text solutionVerified

\frac{F}{A} =

shearing stress

= η \frac{d v}{d x}

\frac{d v}{d x} = \frac{10 m s ^{- 1}}{20} = 0.5

∴

shearing stress

= 0.5 \times 1 0^{- 3}

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Question Text	Water in a river $20 m$ deep is flowing at a speed of $10 m s^{- 1}$ . The shearing stress between the horizontal layers of water in the river in $N m^{- 2}$ is :(coefficient of viscosity of water $= 1 0^{- 3}$ SI units)
Answer Type	Text solution:1
Upvotes	150