Block Speed Liquid Film

A metal block of base area 0.20m2 is placed on a table, as shown in figure. A liquid film of thickness 0.25‌mm is inserted between the block and the table. The block is pushed by a horizontal force of 0.1N and moves with a constant speed. If the viscosity of the liquid is 5.0×10−3‌Pl, the speed of block is ______ ×10−3m∕ s.