For an experienced skydiver, it is 1:1, for a trainee and trainer it is 2:1.
a parachute
When he or she wants the parachute to open
There are about 32,000 member of the United States Parachute Association. That's a close enough answer. Not every skydiver is a member.
-- The force of gravity is unchanged before and after.-- The force of air resistance on the skydiver is greater before, and less after,because she is falling slower after the parachute opens.-- The effect on her of air resistance is greater after the parachute is open. Theincreased air resistance itself acts on the parachute, and its effect is transferredto the skydiver through her harness.
-- The force of gravity is unchanged before and after.-- The force of air resistance on the skydiver is greater before, and less after,because she is falling slower after the parachute opens.-- The effect on her of air resistance is greater after the parachute is open. Theincreased air resistance itself acts on the parachute, and its effect is transferredto the skydiver through her harness.
the magnitude of the skydivers acceleration is zero as he is decelerating by opening his parachute!
Sky divers do not go up, but they do undergo deceleration due to the increased drag incurred by the parachute being suddenly opened. Since skydivers, when being filmed by a cameraman, release their parachute first, there is a relative acceleration between the cameraman and the skydiver, creating the illusion that the skydiver is travelling up.
When a skydiver opens the parachute, he or she does not move upward, but rather, continues to move downward, but at a slower speed. Sometimes there is an illusion that the skydiver is moving upward, because if there are several people skydiving together, and one of them opens a parachute while the others don't, you will see the skydiver with the open parachute moving upward with relation to the other skydivers. But they are all still moving downward, they are just doing so at different speeds.
A skydiver is not in freefall when they have opened their parachute. The move from free-fall to controlled decent under a wing.
Air resistance will increase when the parachute opens, and the decent of the skydiver will slow down.
You call someone who drops from an aircraft by parachute a skydiver.A skydiver, parachuter, or parachutist.
A paratrooper? Either that or SkyDiver