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Physics - Fluid Question with Solution | TestHub

PhysicsFluidViscosityEasy2 minPYQ_2022

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The terminal velocity of a copper ball of radius $5 mm$ falling through a tank of oil at room temperature is $10 cm s^{- 1}$ . If the viscosity of oil at room temperature is $0.9 kg m^{- 1} s^{- 1}$ , the viscous drag force is:NEET 2022 (Phase 2)

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Answer:

Solution:

By Stobal's law, $F = 6 π ηr v$ (where, the symbols have their usual meanings) $F F = 6 \times 3.14 \times 0.9 \times 5 \times 1 0^{- 3} \times 10 \times 1 0^{- 2} = 84.78 \times 1 0^{- 4} = 8.478 \times 1 0^{- 3} N = 8.48 \times 1 0^{- 3} N$

Stream:NEETSubject:PhysicsTopic:FluidSubtopic:Viscosity

⏱ 2mℹ️ Source: PYQ_2022

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