Generally, collisions can be described as either elastic or inelastic. And it's going to be important to figure out which kind you're dealing with, because the math works in very different ways.

Elastic and inelastic collisions are just the two extreme ends of the collision spectrum. Most fall somewhere in between, in that the objects don't stick together but kinetic energy is not conserved.

Physicists recognize two distinct types of collisions: “elastic” and “inelastic.” They have technical definitions, but we won’t go too far wrong if we think of an elastic collision as ...

We report the integral cross sections per scatterer (i.e. elastic collision, phonon excitations, vibrational excitations, electronic excitations and ionization) for 1-100 eV electron scattering in an ...

In the case of a plain collision (that's neither elastic or inelastic), both balls will have some velocity between 0 and v 1. Just as a demonstration, here are three colliding balls.

Students learn to define, give the MKS units for, and calculate momentum.