Crashing, or collision, occurs when two or more objects come into contact with each other, often resulting in damage or injury. This can happen in various contexts, such as vehicle accidents, where cars collide on the road, or in sports, where players may crash into one another during a game. The impact can lead to physical harm, property damage, or disruptions in normal activities. In physics, a collision is classified into different types, such as elastic and inelastic collisions. In an elastic collision, both momentum and kinetic energy are conserved, while in an inelastic collision, momentum is conserved, but kinetic energy is not. Understanding these concepts is essential in fields like automotive safety and engineering.