1. The problem statement, all variables and given/known data A model rocket leaves the ground , heading straight up at 49 m/s a) what is its maximum altitude? b) what are its speed and altitude at 1,4 & 7 seconds 2. Relevant equations v=v0 + at x= x0 + 1/2 (v0 + v) t x= x0 + v0t + 1/2 at^2 v^2=v0^2 +2a (x-x0) 3. The attempt at a solution Am able to work out maximum altitude no problem , for some reason cant get my head around b) ?