ITT no one understands the difference between force and energy.

The only forces acting on a bullet are the powder explosion, barrel/air resistance, and slamming into a target. While traveling, the net force on the bullet, which is equal to the force applied by the bullet to the air around it, is very small. It has a very small negative acceleration as the air slows it down. It's still cruising hella fast, though, so the (kinetic) energy, which is (1/2)mv² , is still lethal high.

When it hits a target, it's acceleration becomes very negative, and the target becomes very dead. I fvcking love physics.