A model rocket fired vertically from the ground ascends, Ask an Expert

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A model rocket fired vertically from the ground ascends with a vertical acceleration of 3.2 m/s2 for 5.2 s. Its fuel is then exhausted, so it continues upward as a free-fall particle and then falls back down.

(a) What is the maximum altitude reached?

(b) What is the total time elapsed from takeoff until the rocket strikes the ground?

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