2007-02-17 18:40:29 · 4 answers · asked by Yasmin G 1 in Science & Mathematics ➔ Physics
air resistance acting upwards and gravitational pull acting downwards.
2007-02-17 19:31:29 · answer #1 · answered by Anonymous · 0⤊ 0⤋
http://en.wikipedia.org/wiki/Parachute
As with some flying things, parachutes have gravity, lift, and drag, but no thrust.
Gravity is manifested through the tension in the lines attached to the payload weight. A parafoil is designed to provide lift, so as to act more like a glider than a classic parachute. And, of course, there is the drag.
http://members.aol.com/ricnakk/paracon.html
added: apparently, there are some parachutes with thrust:
http://www.freedomflightinc.com/Basic_Principles_of_Flight_for_Powered_Parachutes.html
2007-02-17 19:09:38 · answer #2 · answered by arbiter007 6 · 0⤊ 0⤋
air resistance
2007-02-17 18:51:26 · answer #3 · answered by 7 · 0⤊ 0⤋
Drag and friction.
2007-02-17 19:03:33 · answer #4 · answered by Scott S 4 · 0⤊ 0⤋