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Find the terminal velocity of solid sphe...

Find the terminal velocity of solid sphere of radius 0.1 m moving in air in vertically downward direction. `(eta=1.8xx10^(-5)(Ns)/(m^(2))`, density of sphere `=1000(kg)/(m^(3))` and `g=10(m)/(s^(2)))`

A

`2(m)/(s)`

B

`1.2(cm)/(s)`

C

`4(cm)/(s)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
`v=(2r^(2)rhog)/(9eta)`
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