1. Jul 8, 2012

### GarageDweller

In SR, I know we transform three velocities using the einstein velocity addition law.
However, in the case of four velocities, do they simply transform the same way as four positions? With the lambda matrix?

2. Jul 8, 2012

### jcsd

They're Lorentz vectors, so they transform as vectors under a Lorentz transformation. I.e. yes.

3. Jul 8, 2012

### Staff: Mentor

Yes. Try transforming the 4 vector (c,0,0,0) and see what you get. Then try transforming the 4 vector (γc, γv, 0, 0) and see what you get.