A sphere of radius $R$ is gently dropped into liquid of viscosity ɳ in a vertical uniform tube. It attains a terminal velocity $v$. Another sphere of radius $2R$ when dropped into the same liquid, will attains its terminal velocity

Question

Dr. Abubacker · Accepted Answer

(c) Terminal velocity
$v \propto r^{2}$
$	herefore\ \ \frac{v^{'}}{v} = \frac{(2R)^{2}}{(R)^{2}}$
$or\ \ v^{'} = 4v$

Q. A sphere of radius $R$ is gently dropped into liquid of viscosity ɳ in a vertical uniform tube. It attains a terminal velocity $v$. Another sphere of radius $2R$ when dropped into the same liquid, will attains its terminal velocity

Explanation

Reviewed by Dr. Abubacker

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