A steel ball is dropped in a viscous liquid. The distance of the steel ball from the top of the liquid is shown below. The terminal velocity of the ball is closest to .......... $m/s$
KVPY 2019, Diffcult
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(b)
Velocity $=$ Slope of distance - Time graph
Last portion of given graph is a straight line which indicates that velocity is constant, i.e. terminal velocity is reached.
From data of graph, Terminal velocity,
$v=\frac{x_2-x_1}{t_2-t_1}=0.4-0.3$
$=\frac{0.1}{0.3}=0.33 \,m / s$
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