Two small spheres of radii r and 2r fall through a viscous liquid with the same constant speed. The viscous forces experienced by them are in the ratio ………….. .

Two small spheres of radii r and 2r fall through a viscous liquid with

1.	Two small spheres of radii r and 2r fall through a viscous liquid with the same constant speed. The viscous forces experienced by them are in the ratio ………….. .
Answer» `1 : 2` `2 : 1` `1 : 4` `4 : 1` SOLUTION :`F = 6 pi eta a V , (F_1)/(F_2) = (r_1)/(r_2) = r/(2r) = 1/2`