Thanks for all the info! I haven't studied physics since high school and it's difficult getting all the information you provided if you don't know where to start. It looks like NASA has a whole slew of information so I'll be very busy the next few days on their site.
I'm creating a pneumatic launching device to shoot projectiles vertically. I guess the closest thing to compare it to would be a regular gun. Once it leaves the barrel, it will be in a constant state of deceleration until it reaches its peak (no additional thrust provided).
Ignoring...