2.11.4 A flat plate 200 mm x 750 mm slides on oil (u= 0.85 N-s/m²) over a large plane surface (Fig. X2.11.4). What force F is required to drag the plate at a velocity v of 1.2 m/s, if the thickness of the separating oil film is 0.6 mm? Oil Plate F,v Figure X2.11.4 2.3.6 The specific weight of glycerin is 78.6 lb/ft. Compute its density and specific gravity. What is its specific weight in kN/m²?