Two masses traveling at the same speed v₀ collide head on. Nothing is known about the collision other than that it is not completely inelastic. True / False.

false

Explanation:

Elastic collision: the collision is said to be elastic if the kinetic energy is conserved during the collision.

If the kinetic energy is not conserved, then the collision is not elastic.

So, here no information is given so we cant say about the type of collision.

So, it is False.