Lecture
This lecture covers the topic of collisions in line, a subclass of collisions that can be described with a single dimension, focusing on the advantages of such collisions and the conservation of momentum and kinetic energy. The instructor demonstrates the coefficient of restitution, showing scenarios where it is less than, equal to, or greater than 1, illustrating the differences between inelastic collisions with kinetic energy loss, elastic collisions, and inelastic collisions with kinetic energy gain.