A man stands on the roof of a 15.0 m tall building and throws a rock with a velocity of magnitude 30.0 m/s at an angle of 30° above the horizontal. Ignoring air resistance, how long will it take for the rock to reach the ground?   a. 2.0 s b. 0.79 s c. 3.86 s d. 0.5 s

College Physics
10th Edition
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter3: Vectors And Two-Dimensional Motion
Section: Chapter Questions
Problem 7WUE: A skier leaves the end of a horizontal ski jump at 22.0 m/s and falls through a vertical distance of...
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A man stands on the roof of a 15.0 m tall building and throws a rock with a velocity of magnitude 30.0 m/s at an angle of 30° above the horizontal. Ignoring air resistance, how long will it take for the rock to reach the ground?

 

a. 2.0 s

b. 0.79 s
c. 3.86 s
d. 0.5 s


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