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A Rock,released at Rest from the Top of a Tower,hits

Question 65

Multiple Choice

A rock,released at rest from the top of a tower,hits the ground after 1.5 s.What is the speed of the rock as it hits the ground? (g = 9.8 m/s2 and air resistance is negligible)


A) 15 m/s
B) 20 m/s
C) 31 m/s
D) 39 m/s

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