I am literally 5 compared physicists-a tire rolls down hill and it keeps rolling faster can it increase in speed infinitely as long as the hill is infinitely large?
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In classical physics, yes.
BUT, under relativity, the closer the ball gets to the speed of light, the more energy it needs to “push” it the same amount.
So it would essentially get closer and closer to the speed of light.
*this is assuming we ignore wind resistance, and the fact that the tire would tear itself apart well before anything relativistic starts to take effect.*
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