Gwen Releases a Rock at Rest from the Top of a 39-M

question 14

Multiple Choice

Gwen releases a rock at rest from the top of a 39-m tower.If g = 9.8 m/s² and air resistance is negligible,what is the speed of the rock as it hits the ground?
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• A) 28 m/s
• B) 14 m/s
• C) 20 m/s
• D) 39 m/s
• E) ​764 m/s