A sperical ball of radius r and relative...

A sperical ball of radius r and relative density 0.5 is floating in equilibrium in water with half of it immersed in water. The work done in pushing the ball down so that whole of it is just immersed in water is [`rho` is the density of water]-

0.25 `rhorg`

0.5 `rho` rg

`(4)/(3)pir^(3)rhog`

`(5)/(12)pir^(4)rhog`

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