There are three forces acting on a ball of 10 t falling vertically down 17 m into a liquid: the force of gravity (p is the density of the ball), the Archimedean force . (p; - density of liquid) and drag force, empirically established by J. Stoks: (g - radius of ball, v - its velocity). When the ball is moving uniformly, from where . Determine the viscosity of the fluid.