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  • A spherical ball will attain terminal velocity in upward direction with <img alt="\rho \: =\: density\: of\: ball,\; \sigma =density\: of \: liquid" src="/latex-image/?%5Crho%20%5C%3A%20%3D%5C

A spherical ball will attain terminal velocity in upward direction with \rho \: =\: density\: of\: ball,\; \sigma =density\: of \: liquid

Option: 1

Always 


Option: 2

Never


Option: 3

only when  \rho >\sigma

 


Option: 4

only when \rho <\sigma


Answers (1)

best_answer

As we learned 

 

If ρ < σ -

Terminal velocity will be negative.

- wherein

Spherical body attains constant  velocity in upward direction.

 

 Downward terminal velocity 

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

vT is upward if \rho <\sigma

 

Posted by

jitender.kumar

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