Hi, i'm a frehshman in High school writing a paper about Isaac Newton. One of my paragraphs is about the laws of motion. I came across a tidbit of information - there are instances in which Newton's laws are not correct. One example I found was that, at speeds approaching that of light, an objects mass will increase, which contradicts newton's Second law. i've tried to read about general and special relativity but i just cant wrap my head around the concepts. can someone explain for me this phenomenon and why Newton's laws dont explain it?