CoachAir resistance opposes the velocity and grows with speed. A falling body therefore accelerates only until drag balances weight; from there : it falls at a constant terminal speed.
Examples
Example 26.16 (Terminal orders of magnitude)
A flat-out skydiver: about (). A raindrop: about — in vacuum, of fall would deliver it at . A feather: about , reached within centimeters — the secret of its slowness: it spends its whole fall at terminal speed; the hammer never gets near its own.