How much Speed can you take?



When a person is subjected to high speed, they feel the effects of G force. G force is the force felt by a person due to acceleration, and 1 G equals the acceleration of gravity, or about 9.8m/s^2. Since on a Ferris Wheel the acceleration is the centripetal acceleration pointed towards the center of the circle, one will feel lighter at the top, and heavier at the bottom. As the Ferris Wheel speeds up more and more, as the crazy carny tries to kill the passengers, an average person will faint at 5 G's, or 5 times the acceleration of gravity, and
if the G force levels are not reduced, can be proven fatal. Since the G-Force is not a matter of velocity but of acceleration, there isn't a specific speed in which a person will die from if exposed to, but if the Ferris Wheel were to constantly speed up until 5 times the acceleration of gravity, around 50m/s^2, then it will prove to be fatal.

Pilot Exposed to High G ForcePilot exposed to
                    High G Force
Provided by: http://en.wikipedia.org/wiki/G-force