Two hail stones with radii in the ratio 1:2 fall from a great height through the atmosphere Then - Physics - Mechanical Properties Of Fluids

Question

Two hail stones with radii in the ratio 1:2 fall from a great
height through the atmosphere Then the ratio of their momenta after
they have attained terminal velocity is

Deepak Kumar · Accepted Answer

Dear Student,Terminal velocity is attained when gravitational froce is equal and opposite atmospheric drag
It is given by v=29r2(ρ-σ)ηgwhere η is coefficient of viscosity , r the radius , ρ and σ the density 
v1v2=r12r22=122=14Ratio of masses of the two hail stone is m1m2=43πr13
ρ43πr23
ρ=18The ratio of momenta =p1p2=m1v1m2v2=18×14=132p1:p2=1:32Regards

Two hail stones with radii in the ratio 1:2 fall from a great height through the atmosphere . Then the ratio of their momenta after they have attained terminal velocity is...