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Physics - Fluid Question with Solution | TestHub

PhysicsFluidViscosityMedium2 minQB

PhysicsMediumsingle choice

A ball of mass $m$ and radius $r$ is gently released in a viscous liquid. The mass of liquid displaced by it is $m^{'}$ such that $m > m^{'}$ . The terminal velocity is proportional to

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Answer:

Solution:

Using Stokes drag at terminal speed,
$6 π ηr v_{t} = (m - m^{'}) g$
$v_{t} = \frac{( m - m ^{'} ) g}{6 π ηr}$
$v_{t} \propto \frac{m - m ^{'}}{r}$

Stream:JEESubject:PhysicsTopic:FluidSubtopic:Viscosity

⏱ 2mℹ️ Source: QB

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