Just set the variables and enjoy. All of the variables are in meters except the and grams except the time. The velocity is in meters/second. This thing calculates terminal velocity, acceleration, and force. Feel free to ask me what the formulas for those are. Lethal is about 1054 grams per square centimeter, or 15 PSI. See if you can get a combination that is lethal.
All art, scripting, and formulating by me (the formulas are constant formulas). Comment below if you want the formulas.