MHT CET 2024 Physics question
A metal ball of radius m and density fall freely under gravity through a distance 'h' and enters a tank of water. Considering that the metal ball has constant velocity, the value of h is [coefficient of viscosity of water , , density of water ]
Answer: (A)
Solution
The ball enters the water with a speed equal to its terminal velocity (constant velocity), so first find the terminal velocity from Stokes' law: . Substituting m, , kg/m, Pa s: $ =
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