A small glass sphere of radius 2x 10^(-3) m is moving through a liquid of viscosity 0.11 decapaise. Calculate the viscos force acting on it if the speed of the ball is 0.05 ms ^(-1)

A small glass sphere of radius 2x 10^(-3) m is moving through a liquid

1.	A small glass sphere of radius 2x 10^(-3) m is moving through a liquid of viscosity 0.11 decapaise. Calculate the viscos force acting on it if the speed of the ball is 0.05 ms ^(-1)
Answer» Solution :` F = 6 pi eta av = 6 xx 3 .14 xx 0.11 xx 2 xx 10 ^(-3)xx 0.05 = 0.21 xx 10 ^(-3) N`