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Physics - Fluid Question with Solution | TestHub

PhysicsFluidViscosityMedium2 minPYQ_2020

PhysicsMediumsingle choice

A small metal sphere of mass 'M' and density 'd $_{1}$ ', when dropped in a jar filled with liquid moves with terminal velocity after some time. The viscous force acting on the sphere is $(d_{2} =$ density of liquid, $g =$ gravitational acceleration $)$

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Answer:

Solution:

$F = \frac{4}{3} π r^{3} (d_{1} - d_{2}) g$ $F = \frac{4}{3} π r^{3} d_{1} (1 - \frac{d _{2}}{d _{1}}) g = M (1 - \frac{d _{2}}{d _{1}}) g$

Stream:MHT_CETSubject:PhysicsTopic:FluidSubtopic:Viscosity

⏱ 2mℹ️ Source: PYQ_2020

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