Quote:
Originally Posted by gmw
It's fairly simple physics. Momentum is mass x velocity. A bullet's maximum momentum is imparted when it leaves the gun, and conservation of energy requires that the gun (and therefore the shooter) feel the impact of the imparting that momentum (excluding recoilless systems for simplification). If the shooter didn't get thrown backwards then neither will the victim. All that body armour does is distribute the momentum over a wider area. Most movement on the part of the victim comes from shock, muscle reflex, and gravity - not the impact of the bullet. ... Oh, and zombies don't change the physics.
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Actually, it's Newton's third law that covers that one. But besides that, yes you are correct.
As for Zombies ... they do change things because their bodies do not react to the impact in the same way. The same amount of force hits them, but their reaction would be different.