Physics

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A model rocket is launched straight upward with an install speed of 57.6 m/s. it accelerates with a constant upward acceleration of 1.70m/s^2 until its engines stop at an altitude of 240m.
A. What is the maximum height reached by the rocket? The acceleration of gravity is 9.81m/s^2
B. When does the rocket reach its maximum height?
C. How long is the rocket in the air?

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