MHT CET 2025 Physics question
The velocity of small spherical ball of mass ‘m’ and density ‘’, when dropped in a container filled with glycerine becomes constant after some time. The viscous force acting on the ball if density of glycerine is ‘’ is
Answer: (A)
Solution
At constant (terminal) velocity the net force is zero: weight (downward) = buoyant force + viscous force (both upward). Volume of the ball , so buoyant force . Viscous force $F
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