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A ball of radius r and density r falls f...

A ball of radius r and density r falls freely under gravity through a distance h before entering water. Velocity of ball does not change even on entering water. If viscosity of water is `eta` the value of h is given by

A

`2/9r^2((1-rho)/eta)g`

B

`2/(81)r^2((rho-1)/eta)g`

C

`2/81r^4((rho-1)/eta)^2g`

D

`2/9r^4((rho-1)/eta)^2g`

Text Solution

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The correct Answer is:
C
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