A rock is thrown downward from the top of a 40.0 m tower
Chapter 2, Problem 2.25(choose chapter or problem)
A rock is thrown downward from the top of a 40.0 m tower with an initial speed of 12 m/s. Assuming negligible air resistance, what is the speed of the rock just before hitting the ground? (a) 28 m/s (b) 30 m/s (c) 56 m/s (d) 784 m/s (e) More information is needed.
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