A stationary cannon with a mass of 500 kg fires a cannonball with a mass of 5 kg. At the moment of firing, if the cannonball is travelling at a velocity of 8 m/s to the east, how fast and in which direction is the cannon travelling right after firing the cannonball?

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.