Chandra is standing on a flat roof and drops a ball. At the same moment, Mei-Ling, who is standing at the edge of the roof directly below where Chandra dropped the ball, looks up. What does Mei-Ling see?

Make your response very short.
Mei-Ling sees the ball falling straight down towards her. Since Chandra drops the ball without giving it any lateral motion and Mei-Ling is directly below the point of release, gravity acts on the ball by pulling it straight downward. From Mei-Ling's perspective, the ball does not appear to move sideways, only closer as it falls.