Question
What do you mean by viscosity and terminal velocity?
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Answer
Viscosity: It is the property of a fluid by virtue of which an internal frictional force comes into play when the fluid is in motion in the form of layers having relative motion. It opposes the relative motion of the different layers. Terminal velocity: It is the maximum constant velocity acquired by the body while falling freely in a viscus medium. This is attained when the apparent weight is compensated by the viscous force. It is given by,$\upsilon=\frac{2\text{r}^2(\rho-\sigma)\text{g}}{9\eta}$
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