The earth can't accelerate at different rates for each ball though. Velocity equals the initial velocity plus the square root of two times height times acceleration due to gravity. For the ten meter ball, initial velocity is zero, and will fall at:

t=0, h=10, v=0;

h=10, v=7;

h=9, v=20.28;

h=8, ....

..............

................

Same process repeated with the two balls.

The rate of change in velocity between two points in time between t=0 and t=ball2onthefloor is different for both of the balls. Such a task would require an accelerating disk where every atom of it increased or decreased velocity based on the acceleration of the ball in order to acheive such a simulation of gravity. in other words, this idea of the earth being a huge disk and that it needs to accelerate upwards for "gravity" is a silly and complex idea as to how a flat world would achieve "artificial gravity". You could simply say that the "flat earth" was spinning on its axis to produce a gravitational field.

The flat earth means that each part of the disk would be accelerating at different rates. it would mean moving every single atom of the world at a different velocity. But then that would also mean cutting the earth into tiny pieces.

One other thing, gravity is not a hoax, here are a few examples:

The moon (and all other satellites), orbits the earth every ~27 days. If gravity didn't exist, then the moon would shoot away from the earth at an approximate right angle due to the centrifugal force acting outwards with no gravity to pull it back in. Also, if the "flat earth" were actually accelerating upwards, then the earth should crash into the moon.

The Great Pyramid of Geeza (or however you spell it), since it takes the mass (not actually mass) of 3,600,000 tons, has been proven to SLOW DOWN TIME by a tiny bit. Due to gravitational time dilation, there can (almost) only be one explanation for this phenomena, which is that the incredible mass allows for a decent gravitational field to be created (technically 'created' wouldn't be the best choice of wording'). This is proof that gravity exists and is not a hoax.

PS. The reason why I mentioned the Pyramid instead of in space or near a black hole is because it is something that can be proven while still on earth. Why go to space to test this theory when by the time we are in space, we can just see how round the earth really is...

The closer you are to or the stronger the source of gravitation will cause this difference in time.

You can be traveling at 9.8m/s/s, it's simply impossible. You can't travel at acceleration. You can travel at a velocity that changes at a rate of 9.8m/s/s.

How can the moon be a source of gravity but not the earth? They are both made out of the same stuff. Atoms, Protons neutrons electrons, Hadrons, quarks gluons.