Change in Velocity During A Collision (V) 2
Change in Velocity During A Collision (V) 2 :
in crash reconstructions, the change in velocity occurring as a result of an impact usually at the centre of gravity of the vehicle is widely used as the measure of the severity of a collision. At substantial speeds, collisions between cars are almost totally inelastic so there is very little rebound. Thus if a car travelling at 100 km/h strikes a stationary car of the same mass, they will both undergo a change in velocity of 50 km/hr. V is an important measure of the input severity or energy dosage, that relates to the outcome or injury severity. It is therefore a widely used variable in assessing the characteristics of crashes and the benefits of various countermeasures, such as the use of seat-belts and air bags, and changes in speed limits
