A model rocket is launched straight upward with an initial speed of 49.9 m/s. It accelerates with a constant upward acceleration of 1.94 m/s^2 until…

A model rocket is launched straight upward with an initial speed of 49.9 m/s. It accelerates with a constant upward acceleration of 1.94 m/s^2 until its engines stop at an altitude of 138m. What is the maximum height reached by the rocket?How long after lift off does the rocket reach its maximum height? How long is the rocket in the air?

m/s m/s m/sm/s m .