A box is dropped from the roof of a 30m building. As it falls, it passes a window that is 2
meters high and whose base is located 10 meters above street level. Determine the time
required for the box to move past the window. In other words, how long is the box in the
field of vision of a person looking out the window? Neglect air resistance.
top of window is 18 m below the drop point
bottom of window is 20 m below the drop point
find the difference in the flight times
d = 1/2 * 9.8 * t^2 ... t = √(d / 4.9)
plug in 18 and 20 for d to get the flight times