NEET 2021 Physics question
The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is , then the viscous force acting on the ball will be :
Answer: (A)
Solution
F_v=Mg-F_B=Mg-\frac{d}{2}Vg=Mg-\frac{Mg}{2}=\frac{Mg}{2}.