Which of the following lists the three mechanics of injury?

Which of the following lists the three mechanics of injury?

• A. Car to bumper; Windshield to frame; Tire to road
• B. Car to object; Body to interior; Internal organs to bones
• C. Driver error; Weather; Road surface
• D. Airbag deployment; Seat belt tension; Steering input

Answer: (B)

Mechanics of injury refers to how energy from a crash transfers into the person and produces injury. The best description traces that energy flow: the vehicle interacts with an object, the occupant’s body then contacts the interior surfaces, and the rapid forces transmit to internal structures, potentially injuring organs and bones. This sequence—external impact to the object, body contacting the interior, and internal organs sustaining injury from the deceleration—captures how injuries occur in crashes. The other descriptions miss this injury-focused sequence. The first describes damage to the vehicle rather than the human injuries it can cause. The second lists factors that contribute to a crash (driver error, weather, road conditions) rather than the mechanics of how injuries arise. The third mentions safety devices or driving inputs, not the process by which energy translates into bodily injury.

Mechanics of injury refers to how energy from a crash transfers into the person and produces injury. The best description traces that energy flow: the vehicle interacts with an object, the occupant’s body then contacts the interior surfaces, and the rapid forces transmit to internal structures, potentially injuring organs and bones. This sequence—external impact to the object, body contacting the interior, and internal organs sustaining injury from the deceleration—captures how injuries occur in crashes.

The other descriptions miss this injury-focused sequence. The first describes damage to the vehicle rather than the human injuries it can cause. The second lists factors that contribute to a crash (driver error, weather, road conditions) rather than the mechanics of how injuries arise. The third mentions safety devices or driving inputs, not the process by which energy translates into bodily injury.