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Gwen Releases a Rock at Rest from the Top of a 40-M

Question 26

Multiple Choice

Gwen releases a rock at rest from the top of a 40-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?​


A) 28 m/s
B) 14 m/s
C) 20 m/s
D) 40 m/s
E) ​780 m/s

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