I'm originally from stack overflow, so this is my first foray into this particular community.
I've read in numerous places that the Large Hadron Collider is capable of accelerating protons at 0.999999991 c, which mathematically works out to being 3 metres per second slower than the speed of light. That seems so incredibly close to the speed of light, that it's hard for me to understand why we can't quite get all the way there.
My Main Question :
What is preventing the LHC from achieving 1 c, in terms of how fast it can propel these protons?
Side Question :
If we were able to accelerate the protons to the speed of light, what would the results of their collisions be?