A spherical solid ball of volume V is made of a material of density \displaystyle\rho_{}

$.Itisfall\in gthroughaliquidofdensity$rho_

(rho_(2) lt rho_(1))\displaystyle.{A}{s}\sum{e}{t}\hat{{t}}{h}{e}{l}{i}{q}{u}{i}{d}{a}{p}{p}{l}{i}{e}{s}{a}{v}{i}{s}{c}{o}{u}{s}{f}{\quad\text{or}\quad}{c}{e}{o}{n}{t}{h}{e}{b}{a}{l}{l}{t}\hat{{i}}{s}\propto{\quad\text{or}\quad}{t}{i}{o}{n}{a}{l}\to{t}{h}{e}\boxempty{o}{f}{i}{t}{s}{s}{p}{e}{e}{d}{v},{i}.{e}.,F_("viscous") = -kv^(2) (k gt 0)\displaystyle.{T}{h}{e}{t}{e}{r}\min{a}{l}{s}{p}{e}{e}{d}{o}{f}{t}{h}{e}{b}{a}{l}{l}{i}{s}