Medium· Viscosity (Terminal Velocity)· +4 / −1
A spherical ball is dropped in a long column of a highly viscous liquid. The curve in the graph shown, which represents the speed of the ball () as a function of time (), is:
(Figure: on the vertical axis and on the horizontal axis, with four labelled curves A, B, C, D starting from the origin; curve B rises and then flattens out to a constant value as increases, consistent with the ball reaching terminal velocity.)