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A ball of relative density 0.8 falls int...

A ball of relative density 0.8 falls into water from a height of 2m. The depth of which the ball will sink is (neglect viscous forces)

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Retardation of the inside the water
`a=("upthrust"-"weight")/("mass")=(V(1)g-V(0.8)g)/(V(0.8)),a=g/4` M
Now `v_(2)^(2)=v_(1)^(2)-2ah^(1)[v_(1)=sqrt(2gh)` & `v_(2)=0]`
Substituting the vaueswe get h=8m
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