1 mph is 1.47 fps
Nine feet in one second = 6.14 mph
30.8 feet in one second.
10 mph = 14.6 feet per second.
Multiply mph by 0.00045 to get km per second.
About 7.33 feet in one second at five miles per hour.
At 30 mph it takes about one second to travel 45 feet.
1 mile per hour equates to 5,280 feet per hour or 1.467 feet per second.
2 000 000 000 feet in one second
That depends on vehicle speed. At 60 mph a vehicle covers 88 feet in one second. It also depends on the length of the car, but assuming the average car is 15 feet in length, it takes less than 2 tenths of a second to travel one "car length" at 60 mph. So in one second, the average car covers almost 6 car lengths! Double the speed - 120 mph - and that same car covers 176 feet in one second; more than half the length of a football field.
At 55 mph you are traveling 80.66 feet per second and after one hour at that speed you will have traveled 290,400 feet.
One mile is 5280 feet so 310 mph is 1,636, 800 feet per hour Now to find feet per second note that feet/hours x hours/second=feet/second. This tells us we must divide by the number of seconds in an hour which is 3600 so 454 and 2/3 feet per second. If you prefer to do it all at once, here is how that works. (310 miles/hour)(5280 feet/mile)(1 hour/3600 seconds)=454 and 2/3 feet per second.
One sixtieth of a mile = 88 feet.