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QJEEM22Ph2908: JEE Main 2022 Physics - Class 11 JEEM22Ph2908 Solution: The velocity of upper layer of water in a river is 36 kmh 1 .…

The velocity of upper layer of water in a river is 36 kmh −- 1. Shearing stress between horizontal layers of water is 10 −- 3 Nm −- 2. Depth of the river is __________ m. (Co-efficient of viscosity of water is 10 −- 2 Pa.s)

Step-by-Step Verified Solution

F=−ηAdudxF = - \eta A{{du} \over {dx}}

⇒10−3=10−2×10h\Rightarrow {10^{ - 3}} = {10^{ - 2}} \times {{10} \over h}

⇒h=10−110−3\Rightarrow h = {{{{10}^{ - 1}}} \over {{{10}^{ - 3}}}} m = 100 m

⇒\Rightarrow (100)

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