Mary and Debra Stand on a Snow-Covered Roof

Multiple Choice

Mary and Debra stand on a snow-covered roof. They both throw snowballs with the same initial speed, but in different directions. Mary throws her snowball downward, at 30° below the
Horizontal; Debra throws her snowball upward, at bove the horizontal. Which of the
Following statements are true about just as the snowballs reach the ground below? (There could be
More than one correct choice.)

A) Both snowballs hit the ground at the same time.
B) Debra's snowball will have a higher speed than Mary's snowball.
C) Both snowballs will hit the ground with the same speed.
D) Mary's snowball reaches the ground before Debra's snowball.
E) Mary's snowball will have a higher speed than Debra's snowball.