XLord007 wrote:avatar! wrote:A bullet that actually goes through you, produces two holes. One at the point of entry, one at where it exits the body, and in between it destroys all the tissue. If a bullet is stopped, it clearly doesn't do nearly as much damage. I mean, this is really basic logic.
Not so fast... although you will bleed more if you have both entry and exit wounds, bullets that stay in you tend to do a lot more damage because they tumble and bounce off of things, causing much greater disruption than one that just goes in and out. The shape of the bullet and the material it's made of greatly influence what happens when it hits something. For example, hydroshocks are designed to mushroom to nearly double in size when moving through tissue. Another example: one big reason the tiny .223 rounds from the M16/M4 are so effective is because they tumble after entering at very high speed.
Right, Hydra-Shok bullets are meant to expand. Thus, as they pass through tissue they do more damage. Again, they are not effective if moving slowly! Although it's true that some bullets are designed to fragment when they strike, and thus you get shrapnel damage, nevertheless the main cause of damage is because of the velocity. You can't win this argument, it's a matter of basic physics.
The bullet has energy 0.5mv^2
Notice v^2... that's the key here!
Also, if you like, the bullet imparts an impulse on the object which is the change in momentum. Again, change in momentum is simply Del(mv).
Clearly then, Force = impulse/Del(t) and is dependent on velocity.
So anyway you look at it, the imparted energy/force/impulse, all depends on velocity (yeah other factors too, but most importantly velocity).
-avatar!
edit: Isn't physics just awesome