1. The problem statement, all variables and given/known data A one stage booster rocket has a Xo of 0m and a Vo of 0 m/s. The rocket takes off with a constant acceleration until 5 seconds when the boosters turn off and goes into free fall. The rocket is set to explode the instant it hits it's max height. The max height is 1200m. What is the acceleration for the first 5 seconds? What is the Vf for the first 5 seconds? What is the total time of flight? 2. Relevant equations Xf=Xo+Vo(t)+(.5)a(t^2) Vf=Vo+at (Vf^2)=(Vo^2)+2a(Xf-Xo) 3. The attempt at a solution 1st Part Xo1=0m Xf1=Xo2= Vo1=0m/s Vf1=Vo2= a1= t1=5s Part 2 Xo2=Xf1= Xf2= Vo2=Vf1= Vf2=0 a2=-9.8 m/s^2 t2= Also we know: Xf1+Xf2=1200m I kept trying to get to an equation where I could boil it down to one variable but I cant seem to do it... I have used a lot of substitution, please help.... THANK YOU FOR YOUR TIME!