1. The problem statement, all variables and given/known data A rocket is fired vertically and contiues for 1 minute with the acceleration 20 m/s^2. Then it has used up all the fuel , and the rocket continues in free fall. a) How high does the rocket come? 2. Relevant equations [tex]s(displacement)=v_0t + \frac 12 at^2[/tex] 3. The attempt at a solution I can also assume that the initial speed v0 is = 0 m/s, right? This gives s= 0*60s + 1/2 * 20 m/s^2 * (60s)^2 = 36000 m =3.6*10^5 m. However, the answer key of my book says s=1.5*10^5m. Can you find something wrong in what I have done or is my book wrong? Please help!