9. A shell is fired at 400 m/s at an angle of 250 above the horizontal. The plane of the shell's path is perpendicular to a vertical cliff 8000m from the place it is fired. (The shell is fired directly at the cliff.) a) How long after the shell is fired will it strike the cliff? b) How high above the base of the cliff will the shell strike? c) What is the shell's speed when it strikes the cliff? d) What angle does the shell's velocity make with the horizontal just before the shell strikes the cliff? 10. Water flows horizontally from a hose that is 3.0 m above the ground. The water lands 7.2 m to the right of the hose. a) How long does the water take to reach the ground? b) With what speed does the water leave the hose? c) What is the vertical component of the water's velocity the instant before it hits the ground? d) What is the horizontal component of the water's velocity the instant before it hits the ground? e) What is the speed of the water the instant before it hits the ground