Seatbelts in a Collision

From a physics point of view, what would happen if you or your passengers were not wearing a seat belt and the car was brought to a sudden and abrupt halt by a collision with a big tree?


  • Everyone inside the vehicle will move in the direction of impact until they are stopped by their seat belts or the inside surface of the vehicle.
  • Organs get jarred. Solid organs like the spleen and the liver fracture and bleed. Hollow organs like the stomach rupture. Vessels like the aorta tear. Lungs rupture or become punctured.
  • Seat belts protect the driver and passengers from the powerful forward moving forces and the three crashes that occur in any collision.