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Re: [Phys-l] Final velocity of bullets




----- Original Message ----- From: "Brian Whatcott" <betwys1@sbcglobal.net>

NLREG has an iterative solver using the bullet trajectory as an example.
It provides much the same results, I find, for reasonably high elevations.

However, Rick will easily see that small elevations can deliver fast, lethal
bullets. That is the modus of the usual rifle, after all.
To expand on the point: if he will agree on the elevation value
for maximal range, then lower barrel elevations ought to land a bullet
with greater speed.
(usually)


Very small elevations and reasonably close ranges. Keep in mind that a 500 m/s bullet at 5 degrees and now ignoring air-resistance reaches a 96 m altitude and is in the air for about 9 seconds.

My model gives 112 m/s final velocity for an initial 500 m/s at 1 degree (still a good sized elevation),

BUT....the original question is about firing a gun up into the air and the lethality of those bullets. Firing basically horizontally (less than 1 degree elevation) and especially if the bullet keeps spinning is another story.

Rick