[...]
I believe due to the way terminal velocity works, after a certain point it doesn't make that much difference how high you are.
Of course, I don't know if 10k feet is after that point.
Gravity is approx 9.8 m/s
2 (i.e. your speed increases at 9.8 m/s every second if you ignore wind resistance)
Wind resistance is proportional to the square of the velocity
You reach terminal velocity when the wind resistance balances the force of gravity
The terminal velocity of a person depends on their orientation. If their body is parallel to the ground they present the greatest surface area and, therefore, the lowest terminal velocity. I've heard it said on TV programmes the a sky diver has a terminal velocity of appox 120 mph. A
quick check on-line shows that that's appox 54 m/s (you can call it 55 if it makes the maths easier).
In a vacuum, it'd take approx 5.5-6 seconds to reach that velocity. With wind resistance, it'll take longer as the acceleration gets less with time. However, as wind resistance is proportional to the square of the velocty, the acceleration will be almost normal until later. Therefore, it won't take that much longer to reach terminal velocity.