Final answer:
To determine the time it takes for a car traveling at 55 mph to pass a point, we convert the speed to feet per second and then calculate based on average car length, resulting in approximately 0.186 seconds for an average car length of 15 feet.
Step-by-step explanation:
To calculate the time it takes for a car traveling at 55 mph to pass a certain point, we need to convert the speed from miles per hour to feet per second:
- 1 mile = 5280 feet
- 1 hour = 3600 seconds
Speed in feet per second (fps) can be calculated as:
Speed in fps = (55 miles/hour) × (5280 feet/1 mile) / (3600 seconds/1 hour)
This gives us:
Speed in fps = 80.67 fps (approximately)
To find out how long it takes to pass a point, we assume 'passing' means the car travels its own length, we need the length of the car. Assuming an average car length of 15 feet, we can use the formula:
Time (seconds) = Distance (feet) / Speed (fps)
This yields:
Time to pass = 15 feet / 80.67 fps
So, the time will be approximately 0.186 seconds for the car to pass a point.