Model Perspective

Jun 30, 2022 · Fundamentals

What Thickness of Cotton Can Safely Stop a 60 kg Person Falling from 10 km?

This article models a 60 kg human free‑falling from 10 km, analyzes forces such as gravity, buoyancy and air resistance, computes minimum and maximum terminal velocities for different body orientations, and estimates that roughly 6 m of loosely packed cotton or feather‑down would be required to prevent injury, with larger safety margins suggesting 10 m or more.