usually the momentum is really low so it's fine, you could read this wikipedia article about it, share questions if that doesn't clear things up https://en.wik

usually the momentum is really low so it's fine, you could read this wikipedia article about it, share questions if that doesn't clear things up https://en.wikipedia.org/wiki/Energy%E2%80%93momentum_relation https://en.wikipedia.org/wiki/Energy%E2%80%93momentum_relati...