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

When you calculate the force on the tip of a knife generated when someone 150-200 pounds stabs with all their force it comes out around 30tons of pressure that easily passes between the weaves of kevlar. It is also worth noting that a blade is what is used when cutting kevlar when they manufacture armor.