MHT CET 2022 Physics question
A small ball of mass 'M', radius 'R' and density moves with terminal velocity through a container filled with glycerin of density . The viscous force acting on the ball is
(g = gravitational acceleration)
Answer: (C)
Solution
At terminal velocity the net force on the ball is zero, so the viscous force upward equals the weight minus the buoyant force: . The volume of the ball is , so the upthrust is \dfrac${Mσ
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