How fast does bullet gun accelerate?
How much difference does it make if you're 10 cm or 2 m away from the target? How much is the speed difference?
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As soon as the ball is out of the gun barrel, logically there is no more positive acceleration. The propellant gas of the cartridge escapes in all directions. So: Positive acceleration only until the end of the run.
And after leaving the barrel, you will not have a measurable delay (negative acceleration) at 2 m. So it is almost no matter whether it is 10 cm or 2 m in front of the gun mouth.
20 m flight line, which would be relevant for such thick, blunt gunshots.
Delta t 0 thus delta v also differs about 0kmh. Closed naturally