How does a parachute(降落傘) slows the parachutist(跳傘員) down???
Please answer me in ENGLISH & CHINESE!!!
Thx~~
2007-01-19 17:41:00 · 2 個解答 · 發問者 Karman 1 in 科學 ➔ 其他：科學
When the parachutist fall with acceleration, the friction also increase.
Since the friction have a standard maximum value, after that it will not increase.
however, the parachutist still accalerate due to gravity. Then he open the parachute. The parachute has a large surface to increase friction between air. The upward force increase, to slow down the increase of downward force.
Then 2 forces are balanced, so the parachutist reach the theminal velocity and fall down with a constant velocity.
If I remember correctly, it's about 25m per sec.
2007-01-20 08:48:16 · answer #1 · answered by Penelope 1 · 0⤊ 0⤋
The simplest abswer is because of air resistance encountered by the parachute that slows down the falling of the parachutist.
2007-01-19 19:02:03 · answer #2 · answered by 天同 7 · 0⤊ 0⤋