projectile motion. Hitting tge Target

For Home or Lab 1. An arrow shot horizontally from a cliff at 15m/sec lands 45m away. How high is the cliff? 2. A rifle is aimed directly at the bull's-eye of a target 50m away. If the bullet's speed is 300m/sec, how far below the bull's-eye does the bullet strike the target? 3. A rescue line is to be thrown horizontally from the bridge of a ship 30m above sea level to a lifeboat 30m away. With what speed should the line be thrown? 4. Show (algebraically) that the range , in this experiment, can be calculated using x = v~2h/g, where (v) is the horizontal velocity and (h) the height of the table