PHYSICS · Single correct · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids
Problem
In an experiment to verify Stokes' law, a small spherical ball of radius r and density ρ falls under gravity through a distance h in air before entering a tank of water. If the terminal velocity of the ball in water is the same as its velocity just before entering the water surface, then h is proportional to
(1) r4
(2) r
(3) r3
(4) r2