Evidence for Universal Acceleration

Inertial Mass Exactly Equivalent to Gravitational Mass

One of the primary proofs for the Universal Accelerator is that Inertial Mass is exactly equivalent to Gravitational Mass, and this is an unexplained coincidence in physics. It has been called "one of the "deepest, unsolved mysteries in fundamental physics". Why does the physics of gravity behave exactly as if the earth were accelerating upwards?

We read the following from a paper on quantum mechanics:

PBS Equivalence Principle Video

A Globebusters episode discusses the Universal Accelerator as held by the Flat Earth Society. The team looks at a PBS video which states that it was Albert Einstein who came up with the idea of an upwardly accelerating earth. Watch the following video at the 3h4m16s mark for 15 minutes. Here is the video at that timestamp:

Einstein's argument was that Newtonian Gravity is curious in that it operates as if the earth were accelerating upwards. There are too many coincidences with Newton's gravity, Einstein says. It makes more sense is the earth is accelerating upwards. Einstein ends up adopting his upwardly accelerating earth theory to the Round Earth model by making space bend, another way to make the earth accelerate, giving us General Relativity as we know it today.

Summary Breakdown

Firstly, Newton's gravity has all objects move at the same rate towards the earth uniformly. That is its defining feature, and this operates suspiciously as if the earth were accelerating upwards.

Secondly, objects in free fall experience an opposite "fake" force of gravity of the same magnitude in which they are exactly weightless. An astronomical coincidence. Einstein says that the idea that the object is stationary and the earth is accelerating into it is the best conclusion and the best way to make sense of Newton's Gravity.

The Flat Earth concept comes in because it's not possible for the surface of the Round Earth model to accelerate upwards. An upwardly accelerating surface suggests that the earth is flat.

The video presenter appears to further suggest that seven years after coming up with the Equivalence Principle the accelerating earth idea was adopted into General Relativity by using non-euclidean bending space to achieve the accelerating earth illusion of gravity on a Round Earth. The end of the video says that Gravity is still an illusion in GR and bodies like basketballs make "straight line paths" to their destination. It is the environment that moves into the basketball with the space-bending physics of General Relativity.