The Difference Between Invariant and Conserved Momentum

As you go faster your momentum still increases that's always true it's just not a linear increase. There's an important difference between things that are invariant where everybody agrees on them no matter their velocity and things that don't change in a frame of reference so momentum for example is conserved for some observer You always see momentum conserved like before collision after collision is the same momentum but momentum is not invariant meaning different people will measure different amounts at different velocities.