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The speed of a ball of radius 2 cm in vi...

The speed of a ball of radius 2 cm in viscous liquid medium is 20 cm`.s^-1`. The speed of a ball of radius 1 cm in the same liquid will be

A

`5 cm. s^-1`

B

`10 cm. s^-1`

C

`40 cm. s^-1`

D

`80 cm. s^-1`

Text Solution

Verified by Experts

Terminal velocity , `v prop r^2`
`therefore (v.)/(v)=(r./r)^2 or, v=(1/2)^2xx20= 5 cm. s^-1`
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