Georgia DDA 6-Hour Defensive Driver & Driver Improvement Practice Exam

The correct response is based on the exponential nature of kinetic energy and its relationship to speed. When a vehicle's speed increases, the kinetic energy, which is the energy of motion, increases with the square of the speed. This means that a relatively small increase in speed can lead to significantly greater force in the event of a collision. At 50 mph, the risk of death is already heightened due to the dangers involved in high-speed driving. When examining the increase to 70 mph, the relationship between speed and risk shows that driving at 70 mph indeed quadruples the risk of death. This is because the kinetic energy at 70 mph is not just slightly higher than at 50 mph; it increases dramatically due to the square of the speed effect. When a driver travels at higher speeds, the impact in an accident is much more severe due to higher forces at play, and thus the risk of fatality significantly increases. This principle highlights the importance of control and the inherent dangers of speeding, especially in relation to how quickly a crash can become deadly as speed increases.