You are to throw a ball with a speed of 13 m/s at a target that is 4.5 m above the level at which you release the ball. You want the ball's velocity to be horizontal at the instant it reaches the target.
a. At what angle above the horizontal must you throw the ball?
b. What is the horizontal distance that separates you from the target?
c. What is the speed of the ball just as it reaches the target?