A spherical ball falls through viscous medium with terminal velocity \( v \). If this ball is re...

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A spherical ball falls through viscous medium with terminal velocity \( v \). If this ball is replaced by another ball of the same
\( \mathrm{P} \) mass but half the radius, then the terminal velocity will be

W (neglect the effect of buoyancy.)
(1) \( v \)
(2) \( 2 v \)
(3) \( 4 v \)
(4) \( 8 v \)
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