Final answer:
The response time at 50 mph includes the driver's reaction time plus vehicle braking distance. Typical reaction time ranges from 0.5 to 1.5 seconds, and stopping distance can be an additional 120-140 feet under good conditions.
Step-by-step explanation:
The time it takes to react to something in front of you at 50 mph involves both the driver's reaction time and the vehicle's braking distance. A typical driver's reaction time can be 0.5 to 1.5 seconds, depending on various factors such as alertness and distraction. Once the driver reacts and applies the brakes, the braking distance can vary based on the vehicle's condition, road surface, and presence of any additional safety features like anti-lock brakes (ABS). At 50 mph, it might take an additional 120-140 feet to stop the car under good conditions after the reaction time. These details help us understand the overall time and distance it would be required to respond and then come to a complete stop while driving at this speed.