As a counter part to collisions where the largest possible
amount of kinetic energy is converted to
internal energy in one form or another we now consider collisions where
no kinetic energy is lost to internal energy. Such a collision is called
an elastic collision. For an elastic collision energy conservation
reads
In the special one dimensional case this equation and
Eq. 4 are sufficient to express the final velocities in terms
of the initial velocities. The expressions are derived in the book:
