Kinetic energy at collision of two automobiles

At collision of two automobiles under the influence of shock pulses the change of their speed occurs. The dynamic characteristic of movement of mechanical system consisting of two automobiles includes traffic, kinetic moment regarding motionless centre and kinetic energy. On the basis of dynamics theorems the author has determined a loss of kinetic energy of central-straight collision of two automobiles. The paper considers specific cases — elastic and absolutely inelastic collisions. It is established that at elastic collision the kinetic energy decreases by the amount of kinetic energy of lost velocities with amendment that includes a coefficient of recovery at collision.