John throws a rock down with speed 15 m/s from the top of a 27-m tower.If g = 9.8 m/s² and air resistance is negligible,what is the rock's speed just as it hits the ground? A) 22 m/s B) 27 m/s C) 754 m/s D) 23 m/s E) 16 m/s

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Quizplus · Accepted Answer

The final speed can be calculated using the equation v^2 = u^2 + 2gh, where u is the initial speed (15 m/s), g is the acceleration due to gravity (9.8 m/s²), and h is the height (27 m). Solving gives v ≈ 27 m/s.

John Throws a Rock Down with Speed 15 M/s from the Top