Collision of Cars on Road: Inelastic or Elastic?

[opfphysics]

hi experts
Is collison of cars on road an inelastic collision? because friction force is present - please help me in this regard.

 

[Andrew Mason]

hi experts
Is collison of cars on road an inelastic collision? because friction force is present - please help me in this regard.

The collisions are inelastic because the cars to not continue to move after the collision with the same total kinetic energy that they had before the collision. This energy is dissipated in the collision mainly in the form of heat (eg. bending metal).

AM