Why can’t a bullet proof vest protect you from a knife stab?

Question

I mean, it’s designed to stop a bullet which delivers much more force than a human being can ever produce during stabbing

In: 784

Answer 1

Knife stabs tend to keep pushing after facing resistance, since they’re still in the attacker’s hand, while if a bullet faces resistance, it’ll lose energy. That helps a stab get through material that would stop a bullet. Worth noting that bullet-proof vests WILL give way if you get shot in the same spot a few times.