Mary and Debra Stand on a Snow-Covered Roof

question 37

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 30°. When the snowballs reach the ground below,

• A) Debra's snowball will have a higher speed than Mary's.
• B) Mary's snowball will have a higher speed than Debra's.
• C) Both snowballs will hit the ground with the same speed.
• D) Debra's snowball never hits the ground since it is thrown upwards.
• E) Mary's snowball never hits the ground since it is thrown downwards.

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