Question

a big fish swims and swallows a small fish at rest. the big fish continues to swim after lunch. this is an example of
elastic collision
implosion
explosion
inelastic collision

Explanation:

In physics, an inelastic collision is when two objects collide and stick together (or one is absorbed by the other), and kinetic energy is not conserved. Here, the big fish swallows the small fish (they stick together) and continues moving, so it's an inelastic collision. Elastic collision would have them separate with kinetic energy conserved, explosion is objects moving apart from a central point, and implosion is inward collapse (not applicable here).

Answer:

■ Inelastic collision