Definitions for "Feet per second"
US customary unit for velocity. One foot per second equals 304.8 millimeters per second; or 0.3048 meters per second. (abbrev. ft/s).
The standard unit of measurement for velocity. We use feet per second because that is how firearms chronographs measure velocity, and we use these chronographs to measure muzzle velocity of paintmarkers. Also, most ballistic information is provided in fps and thus can be more easily applied to paintball technology.
(ft/sec) the distance in feet that an object or water moves downstream in one second of time; a small twig floats downstream at about 1-2 ft/sec