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Physics - Fluid Question with Solution | TestHub

PhysicsFluidViscosityMedium2 minPYQ_2010

PhysicsMediumsingle choice

Two solid spheres of same metal but of mass $M$ and $8 M$ fall simultaneously on a viscous liquid and their terminal velocities are $v$ and $n v$ then value of $n$ is

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Solution:

$Hints: m = \frac{4}{3} π r^{3} \times ρ m \propto r^{3} (\frac{r _{1}}{r _{2}})^{3} = \frac{1}{8} \frac{r _{1}}{r _{2}} = \frac{1}{2} 6 πn r V = \frac{4}{3} π r^{3} (d = ρ) V \propto r^{2}, \frac{V _{1}}{V _{2}} = \frac{1}{4} n = 4$

Stream:WBJEESubject:PhysicsTopic:FluidSubtopic:Viscosity

⏱ 2mℹ️ Source: PYQ_2010

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