Distance fallen after t seconds: s(t) = 4.9t2
Velocity at time t: v(t) = 9.8t
| time falling | distance fallen in meters | speed in m/s | speed in MPH |
|---|---|---|---|
| 1s | 4.9 | 9.8 | 22 |
| 2s | 19.6 | 19.6 | 44 |
| 3s | 44.1 | 29.4 | 66 |
| 4s | 78.4 | 39.2 | 88 |
| 5s | 122.5 | 49 | 110 |
| 6s | 176.4 | 59 | 132 |
| 7s | 240.1 | 68.6 | 154 |
| 7.9s | 303m=1000' | 77 | 172 |
| 10s | 490 | 98 | 220 |
In a vacuum, weight and shape of falling object have no effect.
Skydiving
spread-eagled: terminal velocity approximately 120–180 mph (53–80 m/s)
head-first: often reaching 200–250 mph (89–111 m/s)
Red Bull: step out of balloon at 39 km (24 mi = 126,720'),
reaching an estimated top speed of 1,357.64 km/h (843.6 mph). 4'19" freefall.
Another: 135,890 feet (41.42 km) and lasted 4'36" in freefall.