ACTAR Vehicle Damage Analysis 5

Question 1

In a pedestrian collision, 'wrap projection' distance is most useful for estimating:

Accepted Answer

The vehicle's speed at impact based on the pedestrian's throw distance over the hood

Answer

Wrap projection uses the distance the pedestrian's body is carried forward on the hood and thrown to estimate impact speed, using established mathematical models.

Question 2

Structural 'hinge buckling' of a vehicle's door during a side impact indicates that:

Accepted Answer

The door structure absorbed significant bending energy, suggesting a high-magnitude lateral force

Answer

Hinge buckling in a door occurs when the lateral force exceeds the door's bending resistance, indicating a substantial side-impact energy input.

Question 3

The term 'delta-V' in collision analysis refers to:

Accepted Answer

The difference in vehicle speeds before and after the collision for a given vehicle

Answer

Delta-V is the change in velocity (magnitude and/or direction) experienced by a specific vehicle as a result of the collision event.

Question 4

When two vehicles of significantly different masses collide, which vehicle will typically exhibit greater crush deformation, assuming similar stiffness?

Accepted Answer

The lighter vehicle, because it experiences a greater change in velocity (delta-V)

Answer

The lighter vehicle experiences a larger delta-V and therefore absorbs more energy structurally, resulting in greater crush deformation despite similar stiffness.

Question 5

Paint transfer evidence between two vehicles in a collision is most useful for:

Accepted Answer

Confirming contact locations and sequencing the collision events

Answer

Paint transfer marks confirm physical contact locations on each vehicle and can help establish the sequence and geometry of collision events.

(ACTAR) Accreditation Commission for Traffic Accident Reconstructionist Practice Test

(ACTAR) Accreditation Commission for Traffic Accident Reconstructionist Practice Test

ACTAR Vehicle Damage Analysis 5