There is a problem about a skydiver
https://community.ptc.com/t5/PTC-Mathcad/Odesolve-and-if-a-task-about-skydiver/m-p/205564#M80320
There is a problem about a gravity train (lift)
https://community.ptc.com/t5/PTC-Mathcad/Mathcad-and-train-in-tunnel/m-p/480957
New problem!
The paratrooper falls from the sky, the parachute does not open for him, but he does not die, because falls into the shaft of a gravity lift, but not with vacuum, but with air. What will happen to the sky diver? What is the pressure of air in the tunnel? Let t=20C! The density of Earth is constant!
