I know I've done this problem a few times before but I'm just a fumbling idiot at the moment.. 1. The problem statement, all variables and given/known data Rocket has an acceleration of 12m/s^2 and at an altitude of 1km the motor shuts off. What is the maximum height? 2. Relevant equations V^2=V_i+2a(x_f-X_i) x_f=x_i+V_i(t)+1/2at^2 3. The attempt at a solution V^2=0+2(12)(1000)=154.92m/s 0=154.92t-9.8t^2, t=17.213s x_f=1000+154.95(17.213)-1/2(9.8)(17.213)^2=2214.82meters I feel like I'm doing it wrong. 12m/s^2 is the acceleration of the motor, shouldnt their be some force from gravity on the rocket while going towards 1000m? Thanks for the help.