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On the physics of momentum in ballistics: can the human body be displaced or knocked down by a small arms projectile?

Abstract：

:Shooting incidents are often portrayed as resulting in a sometimes violent backwards displacement of the victim. This opinion is also not infrequently held by expert witnesses. The physical force responsible for this would be momentum (mass x velocity). The physics of momentum in ballistic injury is explained in detail. The maximum momentum transferred from different small arms projectiles including large calibre rifles and a 12-gauge shotgun only results in a backwards motion of a 80 kg target body of 0.01-0.18 m/s, which is negligible compared to the velocity of a pedestrian (1-2 m/s). Furthermore, counterbalance is constantly maintained by neurophysiological reflexes. So the effect of the momentum transferred from the missile is virtually zero and there is no backwards motion of the person shot. Empirical evidence verifying these calculations can be obtained from hunting big game, from human gunshot victims and from a video documentary demonstrating the lack of any backwards motion of a person wearing body armour after hits from a centre fire rifle. So the alleged backwards hurling of a person shot is nothing but a myth which should be refuted not only because it is incorrect but also because it can result in miscarriages of justice.

journal_name

Int J Legal Med

journal_title

International journal of legal medicine

authors

Karger B,Kneubuehl BP

doi

10.1007/BF01369676

subject

Has Abstract

pub_date

1996-01-01 00:00:00

pages

147-9

issue

3

eissn

0937-9827

issn

1437-1596

journal_volume

109

pub_type

杂志文章,评审

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