Abrupt deceleration refers to a sudden reduction in speed or velocity, often experienced in vehicles or moving objects. This can occur due to emergency braking, collisions, or unexpected obstacles. Such rapid changes in speed can lead to loss of control and increase the risk of accidents. In the context of physics, abrupt deceleration is associated with a high negative acceleration, which can exert significant forces on both the object and its occupants. Understanding this concept is crucial for safety measures in transportation, including the design of seat belts and airbags to protect passengers during sudden stops.