If spacetime is not a material substance, how can it make MASSIVE objects, which tend not to accelerate due to their inertia, move?
2 - If gravity is not a force, why does an object put in rest relative to the earth accelerate toward it?
3 - If the earth mass curved ONLY space, than an object put at rest relative to the earth would continue at rest relative to it. But this is not what happens, so the earth mass also curves TIME. How does this curved time make things to accelerate?
4 - What did you find more difficult, to answer these general relativity questions or playing heads up against me in Stars?
Thanks
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