Posted by StressedStudent on .
A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 76.0 m/s2 for 1.90 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) will the rocket reach?

Physics 
drwls,
After t = 1.9 seconds, it attains a height of
H = (a/2) t^2 = 137.2 m
and a velocity of
V = a*t = 144.4 m/s
As the kinetic energy is converted to gravitational energy at maximum altitude, it will rise an additional distance H' given by
g*H' = V^2/2
H' = 1064 m
The maximum altitude is H + H' 
Physics 
StressedStudent,
I still am not understanding how to obtain the answer