Is the momentum of all cars involved in an inelastic collision conserved?

[xmisiek]

I know that in an inelastic collision, the kinetic energy is not conserved, and the momentum of one car is conserved. However, what about the momentum of all the cars involved?
but why is this?

 

[Ivan A]

The total momentum of all the cars involved in the collision is always conserved no matter what.

 

[austin]

yes its conserved for all objects