A model rocket blasts off from the ground, rising straight upward with a constant acceleration for a time of 1.90s. At this time the speed of the rocket is 96.0m/s, and the fuel completely runs out. Air resistance can be ignored.
a) what is the constant acceleration of the rocket for the 1.90 s ?
b) What is the maximum altitude of the rocket?
c) At what time will the rocket reach the ground again?