If ball of steel (density \rho=7.8\ {cm}^{-3}) attains a terminal | Filo
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Class 11

Physics

Mechanics

Mechanical Properties of Fluids

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 If ball of steel (density ) attains a terminal velocity of when falling in a tank of water (coefficient of viscosity ) then its terminal velocity in glycerin () would be nearly:

Correct Answer: Option(c)
Solution: Terminal velocity of ball when falling in liquid is given by
...eq(1)
1. case
when ball falling in tank of water of density , and terminal velocity
Put all the above value in eq(1)
...eq(2)
2. case
when ball falling in tank of glycerin
and terminal velocity
put all the value in eq(1)
...eq(3)
divide eq(3) b eq(1)



terminal velocity of  ball in glycerin is 
Hence C option is correct.
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