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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS

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The viscous force on a lead shot travelling down with velocity V in a liquid column is F. If the same lead shot travelling down with velocity 3V in an other vertical liquid column is opposed by viscous force 2F, the ratio of the coefficients of viscosities of the liquids is

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Correct option: B

3\mathrm{ }:\mathrm{ }2

The correct answer is A (3 : 2) because the viscous force is directly proportional to the coefficient of viscosity and velocity, allowing us to find the ratio.

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