Asim4450 Asim4450

07-01-2024
Physics

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A small rock is thrown straight up from the edge of the roof of a building with an initial speed of vo. The rock reaches the ground 3.0 s after being thrown and has speed 20 m/s. What is the initial speed vo of the rock?
a) 20 m/s
b) 25 m/s
c) 30 m/s
d) 35 m/s

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