1.

Rain drop of radius 0.2 mm falling with velocity of2 m/s. If coefficient of viscosity of air is 1.8 x 104Ns/m', determine viscous force acting on the drop.

Answer» <p>F = 6πanv</p><p>= 6*3.14*0.2*10^-4*1.8*10^-4*2</p><p>= 13.5648*10^-8 N</p>


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