A metal block of base area 0.20 m^2 is placed on a table, as shown in figure. A liquid film of thickness 0.25 mm is inserted between the block and…

A metal block of base area $\displaystyle 0.20 \mathrm{~m}^2$ is placed on a table, as shown in figure. A liquid film of thickness $\displaystyle 0.25$ mm is inserted between the block and the table. The block is pushed by a horizontal force of $\displaystyle 0.1$ N and moves with a constant speed. If the viscosity of the liquid is $\displaystyle 5.0 \times 10^{-3} \mathrm{Pl}$, the speed of block is $\displaystyle \_\_\_\_$ $\displaystyle \times 10^{-3} \mathrm{~m} / \mathrm{s}$.