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) 30 m/s
C) 56 m/s
D) 784 m/s
Correct Answer:
Verified
Correct Answer:
Verified
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