1. The problem statement, all variables and given/known data Tevatron carries to beams of 1 TeV protons moving in opposite directions, so that for proton-proton collisions the COM frame is also the LAB frame. What proton energy must an accelerator provide to get the same COM energy when bombarding a stationary proton 2. Relevant equations 3. The attempt at a solution Tried working out the velocity of the two protons, and then using velocity addition to add these to see what it would be if one were at rest...hence I could work of the KE of the single proton.. The problem is that the velocity is so close to the speed of light that my calculator won't allow me to do it this way.. is there another way to approach it?