Final answer:
The terms "Three wall shot," "Back wall shot," and "Ceiling shot" are types of shots in billiards or pool, involving nearly elastic collisions and conservation of momentum.
Step-by-step explanation:
The terms "Three wall shot," "Back wall shot," and "Ceiling shot" refer to specific types of shots in the game of billiards or pool. These shots involve complex interactions between the balls, including collisions that are assumed to be nearly elastic, meaning that kinetic energy and momentum are largely conserved. When playing pool, one might notice that the angle between the balls post-collision can be close to 90°, especially if minimal spin is applied. However, significant spin can alter this angle due to the introduction of angular momentum.
The physical properties of billiard ball collisions, including momentum conservation and elastic scattering, are important concepts in understanding the dynamics of two-dimensional collisions, and these principles extend beyond just billiards to other areas of physics.