The energy delivered to the target increases geometrically along with increases in mass, and exponentially with increases in velocity. The amount of energy a bullet radiates into a target is determined by a simple formula taught in high school: It’s the product of one half the projectile’s mass times the square of the velocity. Projectile weapons work by transferring kinetic energy to a target, which ripples out as a shockwave through tissue as the bullet plows through the body, leaving a cavity in its wake. Some basic physics explains why the choice of weapon, or more precisely, the choice of bullet, enabled the suspect, James Hodgkinson, who was killed by law enforcement officers, to wreak so much havoc. The gunman was able to inflict such extensive damage from across a baseball field because he was using a semiautomatic rifle that may have qualified as an assault weapon, akin to a standard infantry combat weapon. Scalise, a Republican from Louisiana whose condition has been upgraded to “serious,” suffered broken bones, ruptured blood vessels, and shredded internal organs. That meant that the tip didn’t just bore straight through him, but rather that the whole length of the projectile rotated over and over through Scalise’s body, ripping a wider hole and distributing a bigger shock wave throughout his bones and tissue. The rifle round, which is longer than a pistol projectile, likely also began tumbling after its point collided with his hip. The projectile, a 7.62 x 39 bullet, hit the House majority whip with between 370 and 1,550 foot-pounds of force. Representative Steve Scalise last week was traveling at somewhere between 1,100 and 2,600 feet per second. Both UOM systems: Imperial & Metric are supported, including automatic value conversions.The bullet that struck U.S. Velocity by the bullet, wad, gun & powder charge masses & muzle velocity. Shotgun Recoil Energy, Impulse & Velocity Calculator - Imperial/Metric - Calculates Shotgun Recoil energy, impulse & gun free Special thanks goes to Scott Rutter for all his help. Gunpowder type (Blackpwoder or smokeless) also accounted, Both UOM systems: Imperial & Metric are supported, includingĪutomatic value conversions. Gun & powder charge masses & muzle velocity. Recoil Energy, Impulse & Velocity Calculator - Imperial/Metric - Calculate Recoil energy, impulse & gun free velocity by the bullet, & the detailed info provided & to Scott Rutter, without whom the metric system calculation wouldn't be available for a long For this one special thanks goes to Charles Winters, for the idea Many people prefer Power Factor formulas over the ME. Gives a different picture for the same rounds. Using it for some time & several responese I've reconsidered original design & now the calculator supports both Imperial & Metric UOM systems & canĪutomatically convert vaules bewteen those two.īullet Power Factor Calculator/Graph - Imperial/Metric - Very similar to the Muzzle Energy Calculator, but the formulas used here areĭifferent. You also can enter sevral bullet masses and draw the comparison graphs, just in case if you want to visualize different loads this way ). The data entered, working mode & the current element number will be transfered to the calculator being loaded.īullet Muzzle Energy Calculator/Graph Builder - Imperial/Metric - Calculator that builds a graph by calculated bullet muzzle energy using That means - you can enter the data in one of those two applets, draw the graphs & then click the Switch link above the applet & go to the other one. On both pages there's a link that switches one calculator toĪnother. New - Muzzle Energy Calc & Power Factor Calc support complete data/state trasfer between them.
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