A shaft with a diameter of $D=80mm$ and a length of $L=410mm,$ shown in the figure below, is pulled with a constant velocity of $U=5\frac{m}{s}$ through a bearing with variable diameter. The clearance between shaft and bearing, which varies from $t_1=1\mathrm{.}2mm$ to $h_2=0\mathrm{.}4mm,$ is filled with a Newtonian lubricant whose dynamic viscosity is $0\mathrm{.}10Pa*s.$ Determine the force required to maintain the axial movement of the shaft.

The force required to maintain the axial movement of the shaft is

N$.$