1. The problem statement, all variables and given/known data A rocket is launched off and accelerates vertically up at 10 m/s 2. At 20 seconds, the motors are turned off, but the rocket keeps going up. a) What height did it reach? b) What was the time it needed to reach that height? g: - 9.8 m/s2 a: 10 m/s2 final velocity: 0 m/s (Not sure). t=20 s 2. Relevant equations h= vo (t) + g(t)2/2 t=(vf-vo)/g vo= vf-g(t) 3. The attempt at a solution I needed to find initial velocity to find height so I did. vo=vf-g(t) vo= 0 m/s - (-9.8m/s2)(20) vo= 196 m/s Now I just substituted to find height. h= vo(t) + (g (t)2)/2 h= 196 m/s (20s) + (-9.8 m/s2 (20) 2)/2 h=3920 m + -3920 m/ h= 3920 m - 1960 m h= 1960 m I really have no clue how do to even start the problem because I'm not sure what is the time total. I was thinking that after it stops accelerating, every second it decreases 1 m/s on it's acceleration so that would 10 more seconds to the total timing. Any help would be appreciated it. Thanks.