What is the terminal velocity of a rain drop of radius 0.02 mm ? [Note that the coefficient of viscosity of air is 1.8 10^-5 N/m^2, density of water is 1000 kg/m^3. Use g=10 m / s^2 and density of ai…

Question

What is the terminal velocity of a rain drop of radius 0.02 mm ? [Note that the coefficient of viscosity of air is 1.8 10^-5 N/m^2, density of water is 1000 kg/m^3. Use g=10 m / s^2 and density of air can be neglected in comparison with density of water]

Accepted Answer

Correct answer: A. (a) We have V_T= 2 gr^2 g_ ( - _f) = 2 10 (0.02 10^-3)^29 1.8 10^-5 (10^3 ) =0.049 m/s=4.9 cm/s

$What is the terminal velocity of a rain drop of radius 0.02 mm ? [Note that the coefficient of viscosity of air is 1.8 \times 10^{- 5} N / m^{2}, density of water is 1000 kg / m^{3} . Use g = 10 m / s^{2} and density of air can be neglected in comparison with density of water]$

Solution

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