The small piston of a hydraulic lift has an area of 0.40 m2. A car weighing 1.2 x 109 N sits on a rack mounted on the large piston. The large piston has an area of 1.10
m². How large force must be applied to the small piston to support the car?

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.