As per Einstein's Theory of General Relativity, I understand that 'the Earth's ground is accelerating towards us at 9.8m/s^2. This is why we're falling towards the center of the Earth, as GR doesn't accept gravity as a force'. So, if a car is supposed to accelerate constantly, at one point of time, it would reach its top speed. Won't the same happen with Earth, as the top speed will be the speed of light? Thank you.
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1Does this answer your question? How can you accelerate without moving? – John Rennie May 29 '21 at 07:04
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For more background see If gravity isn't a force, then how are forces balanced in the real world? – John Rennie May 29 '21 at 07:05
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A useful notion here is coordinate acceleration. See https://physics.stackexchange.com/q/333209/123208 – PM 2Ring May 29 '21 at 07:36