4000 fps +
@ 2000 FPS
280 x 3600/5280 = 190.91 mph
The legal limit is 300 feet per second. Some fields restrict this to 280 or 260 fps.
280 fps
That is sort of like asking how many miles per hour does 100 horsepower equal. Ft lbs is energy, and FPS is speed. There IS a formula to calculate the energy (in foot lbs) of a bullet, but to use that, you need to know SPEED in FPS, and WEIGHT (in grains) of the bullet. A 40 grain bullet at 1000 fps is pretty weak. A 400 gr bullet at 1000 fps can drop a moose.
The same as any other 9mm. It can range from 800 FPS to well over 1000 FPS depending on the cartridge.
It can vary from 2000-2800 + FPS
In a snail, YES. In a bullet, NO!
FPS is the measurement of speed in feet per second. Depending on what kind of bullet you are talking about, bullets can travel as fast as 4400 fps. Here are a few examples: 9mm-about 1050 fps. .45ACP-about 900 fps. 5.56mm-about 2700-3300 fps. .50bmg-about 2900 fps.
The dry air speed of sound is about 1125 FPS, so anything over that is considered supersonic.
About 6336 miles per hour (mph)