The velocity of a small ball of mass ' $m$ ' and density $d _{1}$, when dropped in a container filled with glycerine, becomes constant after some time. If the density of glycerine is $d _{2}$, then the viscous force acting on the ball, will be
JEE MAIN 2022, Medium
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$F_{V}=m g-F_{B}$
$=m g-\left(\frac{m}{d_{1}} \times d_{2}\right) g$
$=m g\left(1-\frac{d_{2}}{d_{1}}\right)$
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