OtakingGX said:If you calculate the momentum of a bullet, then transfer all of that to the new mass (bullet + body) you'll find that a bullet could not even knock a person over. It's definitely Hollywood and old westerns that have left us with the impression that they can. Even the much lauded Desert Eagle would impart a velocity of about 11 cm/s on a person weighing 180 lbs. And that's only if their body completely stopped the bullet.
I like explosions too, and I justify them in movies by telling myself that everyone drives cars around packed with C4.
The physics used in games, though throw the whole scale of things off. It makes you feel like you're playing in a miniature world. Objects don't seem to have enough mass for their dimensions. If you were to shrink everything down to half its height then that crate would have 1/8 the mass, and would bounce like that when you hit it.
Forget science... depending on where you are hit, the size of the projectile, its spin and composition... yeah you can be knocked over... not to mention directional tissue damage and pain...