Final answer:
The stopping distance of a car at 65 mph varies based on several variables. If conditions are ideal, a distance of around 300 feet may be expected, but the exact stopping distance requires specific calculations or an experiment to determine. so, option c is the correct answer.
Step-by-step explanation:
The stopping distance of a car depends on several factors including initial velocity, road conditions, driver reaction time, and the coefficient of friction between the tires and the road. At 65 mph, which is approximately 29.1 m/s, the stopping distance will certainly be greater than the options of 100 feet (30.5 m) to 400 feet (121.9 m) provided. Assuming dry conditions, a typical stopping distance at that speed might be in the range of 300 feet, depending on the exact conditions and the vehicle's braking ability. However, to determine the exact stopping distance, we would need to perform an experiment or calculation that accounts for all these factors.
For instance, to set up an experiment, one would:
- Drive the car at exactly 50 mph and then apply the brakes until it stops while recording the distance.
If assuming a reaction time of 0.500 seconds, one would calculate the distance the car travels during the reaction time and then add that to the calculated braking distance.