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  • A ball with density , is falling inside a liquid of density , the ball will move downward wit

A ball with density \rho, is falling inside a liquid of density \sigma, the ball will move downward with terminal velocity 

Option: 1

Always 


Option: 2

Only when \rho >\sigma

 


Option: 3

Only when\rho <\sigma


Option: 4

It will never move with constant velocity 


Answers (1)

best_answer

As we learned 

 

If ρ > σ -

Terminal velocity will be positive.

- wherein

Spherical body attains constant  velocity in downward direction.     

 

 v_{T}=\frac{2}{9}\frac{\left ( \rho -\sigma \right )}{\eta }r^{2}g

\therefore v_{T} is downward only if \rho >\sigma

 

Posted by

Irshad Anwar

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