A baseball leaves a pitcher's hand horizontally at a speed of 160 km/h. The distance to the batter is 18.3 m. Neglect air resistance.
a) How long does the ball take to travel the first half of the distance?
b) The second half?
c) How far does the ball fall under gravity during the first half?
d) The second half?
e) Why are the quantities in (c) and (d) not equal?