88 fps
60 mph is 88 feet per second.
60 mph = 88 feet per second.
At 60 mph you are traveling at 88 feet per second.
Feet per second square ARE the units in this case.
60 miles per hour is 88 feet per second..
88ft/sec x0.681818182=60mph
Acceleration
Velocity, the units are meters per second, or feet per second.
Kilometres per hour or miles per hour for a car. You could use the same units for runners but most would use metres per second or feet per second.
A kilometre is a unit of distance. Feet per second is a unit of speed. The two units are therefore incompatible.
Speed or velocity can be measured in a number of units. Miles per hour, feet per second, metre per second.
21 feet per second is approximately 14 miles per hour.