An inelastic collision is a type of collision where two objects collide and do not bounce apart completely. Instead, they stick together or deform, resulting in a loss of kinetic energy. This means that some of the energy is transformed into other forms, such as heat or sound, rather than being conserved as motion. Inelastic collisions are common in everyday life, such as when a car crashes into another car and crumples upon impact. Unlike elastic collisions, where total kinetic energy is conserved, inelastic collisions focus on the conservation of momentum, which remains constant before and after the collision.