an object of mass 30kg is falling in air and experiences a force due to air resistance 50N. (a). determine the net force acting on the object and (b). calculate the acceleration of the object

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.