Disproving the existence of UA is simple. According to FET, the Earth is accelerating at a constant rate of 9.82 m/sec^2. Therefore, to calculate the Earth's current velocity, we need only multiply the given rate of acceleration by the Earth's age in seconds. If we accept the Earth is approximately 4.5 billion years old, and we assume it began accelerating immediately, then the Earth's age in seconds is roughly (4.5*10^9)*365*24*60*60, or 1.419*10^17 seconds old (141,912,000,000,000,000 seconds). Now multiply that by 9.82 for the current velocity in m/sec for 1.39*10^18 m/sec (1,393,575,840,000,000,000 m/sec). The speed of light is approximately 2.998*10^8 m/sec (299,800,000 m/sec). Therefore, according to FET, the Earth is currently moving at a velocity equal to 4,648,351,701 times FASTER than the speed of light. Four MILLION times faster than the speed of light...and accelerating.

If we accept the theory that the Earth is only 6,000 years old, then the speed is less preposterous, but still impossible; it's a mere 6,197 times the speed of light. Physics tells us that it is impossible for anything to exceed the speed of light, because the energy required to accelerate to that velocity would be near infinite. So, anytime a flat-earther tries to tell you their theory is sound, just remember that they believe we're moving at least thousands of times faster than the speed of light AND STILL ACCELERATING.