Final answer:
The average driver's reaction time accounts for a certain distance traveled before stopping a car. In this case, the distance traveled during the reaction time at 40 MPH can be calculated.
Step-by-step explanation:
The correct answer is option C. When a driver reacts, the stopping distance is the same as it is in Parts A and B for dry and wet concrete. To answer this question, we need to calculate how far the car travels during the reaction time, and then add that to the stopping time.
It is reasonable to assume that the velocity remains constant during the driver's reaction time.
For example, if the average driver's reaction time is 0.5 seconds and the car is traveling at 40 miles per hour (mph), we can calculate the distance traveled during the reaction time using the formula: distance = velocity x time. In this case, the distance traveled during the reaction time would be: distance = 40 mph / 3600 seconds per hour * 0.5 seconds = 0.2222 miles = 1171.68 feet.
The correct answer regarding the average driver's reaction time and the distance covered at 40 MPH (approximately 17.9 meters per second) cannot be directly determined without specific data.
However, based on the provided information that assumes a reaction time of 0.500 seconds for a car initially traveling at 30.0 m/s, we can infer that at a lower speed, the distance traveled during the reaction time would be proportionally less.
If we assume the same 0.500 second reaction time for a car traveling at 40 MPH, we can calculate the distance as: speed (17.9 m/s) × reaction time (0.500 s) = distance traveled during reaction time, which would be approximately 8.95 meters (or about 29-30 feet).
Regarding the second part of the statement, 'The length of a point suspension is 3 months for 18 points within an 18-month period.'
This is typically related to driver's licensing rules and regulations, which can vary depending on the region, so without more context this sentence cannot be answered definitively within the scope of a Physics question.