#### Comment Preferences

• ##### No...(3+ / 0-)

see my comment above, and read some more at your link. You forgot to account for the variations in the mass of the bullets. Most handgun ammunition uses much heavier bullets than the AR-15 uses.The AR-15 produces about 3 times the kinetic energy of a 9mm handgun such as that used by Jared Loughner, or the police. Energy, expressed in ft/lbs, not velocity, is the measure of a bullet's force.

"A lie is not the other side of a story; it's just a lie."

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• ##### asdf(1+ / 0-)
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PavePusher

Well, to be fair, kinetic energy is not force.  You can get the force easily enough by taking the derivative with respect to the distance acted.  To get the pressure, also divide by the area of the impacted cross section.

When God gives you lemons, you find a new god.

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• ##### Try again, happy camper(2+ / 0-)
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I'm sure you can do basic math.

It's all there in my comment, the one you misunderstood. I won't hold it against you, if you need time to study it.

Kinetic energy only scales linearly with mass.

A bullet with 2x mass, will emerge with 2x kinetic energy IFF the muzzle velocity is the same.

"They did not succeed in taking away our voice" - Angelique Kidjo - Opening the Lightning In a Bottle concert at Radio City Music Hall in New York City - 2003

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• ##### You have not (1+ / 0-)
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PavePusher

accounted for the difference in mass between the round fired by the AR-15 and that fired by a handgun. All you did was square the velocity and compare those numbers.

Look at these two tables and compare the muzzle energy of the various types of ammo. No math is required.

http://www.chuckhawks.com/...

http://www.chuckhawks.com/...

.44 mag pistol: ~700ft/lb

5.56 rifle: ~1700ft/lb

"A lie is not the other side of a story; it's just a lie."

[ Parent ]

• ##### But if you want to explicitly define the (3+ / 0-)
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