In a two-vehicle central collision, which statement best describes the impact?

In a two-vehicle central collision, which statement best describes the impact?

• A. The force is applied through the center of mass of both vehicles
• B. The force never aligns with vehicle centers
• C. The collision always results in vehicle rollover
• D. The direction of force is always horizontal

Answer: (A)

In a central collision the impulse line of action passes through the centers of mass of both vehicles, so there is no rotational moment produced about those centers. Because the force acts through the center of mass, the torque is zero and the vehicles experience primarily translational motion along the line of impact rather than spinning. If the impact were off-center, a torque would occur, causing rotation or yaw and possibly rollover depending on energy and geometry. The other statements aren’t correct because they describe effects that don’t necessarily occur in a perfectly central hit: the force does align with the centers in a central collision, rollover isn’t guaranteed, and the direction of the force isn’t inherently fixed as horizontal.

In a central collision the impulse line of action passes through the centers of mass of both vehicles, so there is no rotational moment produced about those centers. Because the force acts through the center of mass, the torque is zero and the vehicles experience primarily translational motion along the line of impact rather than spinning. If the impact were off-center, a torque would occur, causing rotation or yaw and possibly rollover depending on energy and geometry. The other statements aren’t correct because they describe effects that don’t necessarily occur in a perfectly central hit: the force does align with the centers in a central collision, rollover isn’t guaranteed, and the direction of the force isn’t inherently fixed as horizontal.