The terminal velocity of a 2 cm radius ball in a viscous liquid is 20 cm s-1. What would be the terminal velocity if the radius of the ball were halved?
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a
80 cm s-1
b
40 cm s-1
c
20 cm s-1
d
5 cm s-1
answer is D.
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Detailed Solution
v0 ∝ r2since r becomes one-half therefore v0 becomes one fourth.