JEE Main 2022 Physics question
The velocity of upper layer of water in a river is 36 . Shearing stress between horizontal layers of water is . Depth of the river is m. (Co-efficient of viscosity of water is Pa.s)
Answer: 100
Solution
The stress is F/A = . Here 36 km/h = 10 m/s, so (10/h), giving h = 100 m.