I have come to notice that there are two equations for calculating momentum and I am under the impression that both equations provide different answers. There is the Newtonian, classical equation of p = mv, where p, is momentum, m is mass, and v is velocity. Yet also there is the relativistic equation for calculating momentum of p= mv / √ 1 - v squared / c squared, where c is the speed of light. Therefore, what equation would you recommend to use, and which equation is more accurate? Thank you for your help and happy holidays!