Lorentz Transformations 6:7  Lorentz Transformations 7:7 » 
Lorentz TransformationsRelativistic Addition of Velocities 


In classical Newtonian mechanics, two different velocities and are added together by the formula , where is the sum of the two velocities. However, in special relativity, the velocities are added together as
This formula is called the relativistic addition of velocities. Note that if = c and/or = c, then = c, and for small velocities , << c, then the classical formula is regained.

