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  • A ball of relative density 0.8 falls into water from a height of 2m. The depth to which the ball will sink is(neglect viscous force)  Option: 1</s

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

 

Option: 1

8m


Option: 2

2m


Option: 3

6m


Option: 4

16m


Answers (1)

best_answer

velocity of ball just before striking water surface, v=\sqrt{2gh}

                                        or v=\sqrt{4g}\ \ \ \ \ \ \ \because h=2m

\begin{aligned} &Retardation\ in\ water\ a=\frac{\text { Upthrust }- \text { Weight }}{\text { Mass }} \\ & a=\frac{V \rho_w g-V \rho g}{V \rho} \\ & a=\left[\frac{1-0 . s}{0 . s}\right] g \\ & a=g / 4 \end{aligned}

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