Aswimmer bounces almost straight up from a diving board and falls vertically feet first into a pool. she starts with a speed of 4.8m/s, and her takeoff point is 1.95m above the pools surface. for how long are her feet in the air, in seconds?

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.