Discussion Overview
The discussion centers around the feasibility of a .45 ACP bullet penetrating through multiple human heads, as depicted in the movie "Wanted." Participants explore the physics involved in bullet penetration, including energy, force, and the resistive properties of human tissue and bone. The conversation includes both theoretical calculations and practical considerations.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- Some participants suggest that the velocity of the .45 ACP round and the resistive force of a human head are critical factors in determining penetration capability.
- Others propose that the average penetration of a .45 ball round in gelatin could serve as a reference point, estimating it to be around 12-24 inches, while noting that this does not account for bone hardness or bullet disintegration.
- One participant mentions a video of a .50 caliber round penetrating a water-filled dummy, expressing skepticism about the ability of any bullet to penetrate multiple heads.
- There is a discussion about whether to use energy or force in calculations, with some uncertainty about how to quantify the energy dissipated when a bullet passes through a head.
- Another participant suggests that calculating the force a head provides against a bullet could help determine energy loss, but acknowledges that the bullet's deformation complicates accuracy.
- Some participants express curiosity about the mechanics of spinning a bullet to alter its trajectory, with a clarification that a bullet cannot curve due to the straight barrel of the gun.
Areas of Agreement / Disagreement
Participants generally agree that the scenario presented in the movie is unrealistic, but there is no consensus on the specific calculations or methods to disprove the penetration claim. Multiple competing views on the physics of bullet penetration remain unresolved.
Contextual Notes
Limitations include the complexity of human anatomy, the unknown factors affecting bullet deceleration upon impact, and the difficulty in obtaining accurate experimental parameters for calculations.
