Do seatbelt stretch to absore energy in a crash?

Yes, seatbelts are designed to stretch slightly during a crash to help absorb energy and reduce the force exerted on the occupant's body. This controlled elongation helps to slow down the occupant's movement more gradually, minimizing the risk of injury. The materials used in seatbelts, such as nylon, allow for this stretch while maintaining strength and safety. Overall, this feature enhances the effectiveness of the seatbelt in protecting passengers during a collision.