Final answer:
The 6 second rule should be used on wet roads to ensure a safe stopping distance, accounting for longer braking distances and driver reaction time.
Step-by-step explanation:
On wet roads, it is best to use the 6 second rule when determining the safe following distance. This increased time is necessary because the stopping distance required on wet pavement is longer than on dry pavement. For example, if a car is initially traveling at 30.0 m/s, it can decelerate at a rate of only 5.00 m/s² on wet concrete compared to 7.00 m/s² on dry concrete.
Additionally, the car's braking distance, along with the driver's reaction time of 0.500 seconds, must be factored into the total distance needed to safely come to a stop.
The best distance rule to use on wet roads is the 6 second rule. This rule suggests that a driver should maintain a minimum following distance of 6 seconds from the car in front of them. This allows for a safer braking distance in case of sudden stops or slippery road conditions.