1. The problem statement, all variables and given/known data This is the problem: You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 16 m/s2. After 20 s, the engine shuts off and the rocket continues rising (in freefall) for a while. (Neglect any effects due to air resistance.) The rocket eventually stops rising and then falls back to the ground. You want to get a sample of air that is 11 km above the ground. Here is what I still need to find: (1) Determine the total time the rocket is in the air in seconds. (2) Find the speed of the rocket just before it hits the ground. 2. Relevant equations 3. The attempt at a solution I need formulas to figure these out. I have already done part of this problem by finding the highest point my rocket reaches. (8.4 km) I made a graph and found xf1 xf2 vf1 and vf2. Can somebody please give me the formulas to finding the total time and the speed before it hits the ground. Thanks.