A rock, released at rest from the top of a tower, hits the ground after 3.5 s. What is the speed of the rock as it hits the ground? (g = 9.8 m/s2 and air resistance is negligible)

a. 34 m/s
b. 17 m/s
c. 44 m/s
d. 68 m/s
e. 24 m/s


a

Physics & Space Science

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