Why can't black holes be used to accelerate bodies to the speed of light?
How can an object not accelerate past the light speed limit when some black holes are so massive, their gravitational acceleration is over it?
Is the speed of an object near the black hole equal to the speed of light? If light can't even escape a black hole, does that mean it is being sucked in faster than its speed? At the boundary of a black hole, does time become so slow that light from it never escapes, or space becomes so large that despite the speed of light being the same, light is not able to escape? Special Relativity: What would stop someone accelerating beyond the speed of light if they had achieved 99.9% of the speed of light? If light being pulled into a black hole is being pulled at the speed of light so it cannot escape does that mean anything inside is moving at the speed of light? Since light is the fastest thing known in the universe and cannot escape from a black hole, does that mean there is a power inside a black hole that is faster than light? How many times would a black hole with mass of Jupiter need to suddenly appear and disappear in front of spacecraft in order to reach speed 1/3c? The force of gravity is greater for more massive objects. Why don't more massive objects accelerate faster towards Earth? Given that photons have no mass and the speed of light cannot be exceeded, could there be a negative mass that exceeds the speed of light? Does gravity affect the speed of light? Does gravity affect the speed of light? Do gravitational waves travel faster than the speed of light? At what rate does mass increase for an object being accelerated to a velocity close to the speed of light? Why isn't the cosmic acceleration limit equal to the speed of light divided by the planck time? What is the velocity of a photon in a black hole? What would happen in a collision of two equal-mass black holes, travelling in opposite directions at 99.99% of the speed of light? How powerful is a black hole? Is it theoretically possible to launch an object to orbit around the supermassive black hole, inside an event horizon, so it won't collapse too fast? How can the speed of light be squared in Einstein's theory of relativity if nothing exceeds that speed other than expansion of the universe? What would happen if you smash two of the most massive Black Holes known in the Observable Universe together, at 99.9999999999999% the speed of light? Why is there no limit on maximum acceleration similar to one on maximum velocity (i.e. speed of light)? If space can expand faster than speed of light, then could a gravity wave travel faster than the speed of light as it's a ripple in space? How fast can you accelerate to the speed of light? What is the acceleration due to gravity? Is it true nothing can go faster than the speed of light? Do galaxies travel faster than the speed of light? I know that light cannot travel faster than the speed of lights. But can it travel with a smaller velocity than the speed of light? How big do colliding black holes need to be in order to generate detectable gravitational waves? How can the far reaches of the unobservable universe be expanding at faster than the speed of light? Why did Einstein assume that the maximum possible speed is the speed of light?