What does it mean Infinite mass?
Since it takes infinite energy to accelerate an object with mass to the speed of light, it can never happen. And you are right, if such an object did reach 99.99999…the speed of light, it would have mass approaching infinity relative to us. Infinity in science means that making some parameter larger would not change the results. So if you have two H atoms, you know that they will be attracted to each other and readily form H2 molecule. However if they are beyond the range of the interactions, say 10-3 m, then it really does not matter if they are a cm apart or a light year, because they are separated by infinity. In this case infinity is 10-3 m. In other words, they will not form H2 when they are separated by infinity and in this case infinity is 10-3 m. So infinity is relative to what you are discussing. Let us suppose that a person is traveling at 99.999999 times the speed of light. Well if the forces acting on him or her are similar to those on us on Earth, they will feel just lik
