Final answer:
In physics, a low-velocity gunshot without a fracture means that the bullet was fired at a relatively slow speed that did not break any bones.
Step-by-step explanation:
In physics, the velocity of an object refers to its speed in a given direction. When a gunshot occurs at a low velocity without causing a fracture to an extremity, it means that the bullet was fired at a relatively slow speed that did not break any bones. For example, if someone is shot in the leg but there is no fracture, it indicates a low-velocity gunshot.