That depends on the driver's reaction time, the weight of the car, the condition of its brakes,
the condition of the tires, and the material and condition of the pavement.
In the drivers' ed. manual, and often on the written license exam, it's usually recommended
that at 30 miles per hour, you leave 3 car lengths open between your car and the one
in front of you.
At 87 miles per hour you would be traveling 459,360 feet per hour OR 127.6 feet per second.
55 feet
Stopping Distance = about 56.25 feet.
2640 feet
A plane going 300 miles per hour is going 440 feet per second. (300 * 5280 / 60 / 60) In four hours, it will have traveled 1,200 miles, or 6,336,000 feet.
You are traveling at 88 feet per second at 60 miles per hour.
At 87 miles per hour you would be traveling 459,360 feet per hour OR 127.6 feet per second.
The skateboard is going 4.64 miles per hour.
At 50 miles per hour you are traveling 73.3 feet every second.
55 feet
Stopping Distance = about 56.25 feet.
You are going 6.82 miles per hour.
2640 feet
31.8 mph = 46.64 feet per second
337.3 feet per second at 230 mph
A plane going 300 miles per hour is going 440 feet per second. (300 * 5280 / 60 / 60) In four hours, it will have traveled 1,200 miles, or 6,336,000 feet.
10 miles/hour = 14.66667 feet /sec