Framed and unibody vehicle reduce force of impact by doing what?

• A. Absorbing all the energy in the frame
• B. Distributing force away from passengers
• C. Increasing vehicle mass
• D. Reducing friction in tires

Answer: (B)

When a collision happens, the goal is to keep peak forces on the occupants as low as possible by spreading and dissipating energy through the vehicle’s structure. Framed and unibody designs accomplish this by creating crumple zones that deform in a controlled way, absorbing a large portion of the crash energy while the passenger cabin stays relatively intact. This energy transfer is then further managed by safety systems like seat belts and airbags, which increase the time over which the vehicle slows down and reduce the instantaneous force on people inside.

Why this works best: distributing the load across a wider area and over a longer period lowers the peak deceleration that occupants experience. Absorbing all energy in the frame isn’t how these designs operate, and simply increasing vehicle mass doesn’t inherently reduce the force transmitted to passengers. Tire friction isn’t the primary mechanism for mitigating crash forces either.