Aball is thrown horizontally from a platform so that the initial height of the ball is 6.0 m above the level ground below. the ball lands 24 m from its original horizontal location. find how fast the ball was thrown. show all work.

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.