
I realize that there is virtually no way to convince the FE (otherwise science already would have) but in the interest of improving your "model" here is a definite issue.
Presumably, flat earthers believe that the atmosphere is higher than 150 feet from the surface of the world, after all, we can climb tall buildings and still breathe! However given the constant acceleration of the earth, everything on it would slowly drift away from the north pole and then off the edge of the disc. With walls 150 feet high, this will happen trivially fast - the air will float off first, and then everything else that isn't nailed down will be making a slow but inevitable movement off the disc due to evaporation (which happens in all materials).
This will actually eventually happen even if the walls are thousands upon thousands of miles high - even a bowl shape will not preserve the materials indefinitely, however with walls as short as posited by the FEers, this will cause the edge of the disc to be a howling void, and unless the atmosphere of the planet is constantly replenished (which opens up an entire set of issues itself), or the entire universe is full of earth's atmosphere, (which would have its own set of issues to explain), then the earth would already be completely depleted of breathable air (and just about everything else save for bare rock).
Now before you say that the air is accelerating too - what would the mechanism for that be? The air is clearly affected by "gravity" just as we are, and since we aren't accelerating at the same speed as the earth upwards, then the air isn't either. Next, you can test this result in your kitchen: put some water on a plate and hold it on your hand (vertically) while spinning around. The water won't accelerate at the same rate as the plate, and splash all over. Our atmosphere will operate the same way. The plate's lip has to be pretty high for it to keep all the water in place - pretty much it has to be a bowl, which will exhibit the same issue but keep the water where it is. But the earth is flat with only an almost imperceptible lip (150 feet is literally impercievable compared to the size of the earth), and the atmosphere is at least 25,000 feet tall (since thousands upon thousands of people have flown that high, and climbed mountains that high). Clearly the atmosphere would have all spilled over the edges of the "plate" that is the flat earth if it's accelerating at a constant rate.
(Now if the earth is a flat plane that is infinite in all directions, that exhibits its own set of issues)
I'm pretty curious as to what the explanation for this is.